PARAMETER SETTINGS

PERFORMANCE DATA

DIAGNOSTIC CODES

2

To Obtain Performance Data:

1. Press and hold the (Down) button for two

seconds (Fig 1).

2. While holding the (Down) button, press

and hold the “Domestic Hot Water” (DHW)

button (hold both buttons at the same time)

(Fig 1).

3. Use the (Up) and (Down) buttons to

scroll to the desired information described in

Table 1. Performance Data (Fig 2).

4. The data for the performance number

automatically appears in the display (Fig 3).

5. To exit performance data, repeat step 2 above.

1

Table 1. Performance Data

To Display Diagnostic Codes:

1. Press and hold the “DHW” button for two seconds and then the (Up) button simultaneously (Fig 9).

2. The last nine maintenance codes display and flash one after the other.

3. To exit diagnostic codes and return the boiler to normal operation, press and hold the “DHW” button for two seconds, and then the (Up) button simultaneously.

1. To access the parameter settings, press and hold the red button on the PC Board for five seconds (Fig 5).

2. Press the “Mode” button on the controller (Fig 6).

3. Press the (Up) or (Down) arrows to select a parameter setting. Press the “Select” button (Fig 7).

# Data Unit

01 Water Pressure PSI/bar1

02 Water Flow Rate x0.1 GPM/LPM1

03 Supply Temperature °F/°C1

04 Return Temperature °F/°C1

05 Freeze Protection Temperature °F/°C1

06 Exhaust Temperature °F/°C1

07 Outgoing Temperature °F/°C1

08 Inlet Temperature °F/°C1

10 Heat Exchanger Outlet Temperature °F/°C1

11 Fan Frequency Hz

13 Water Flow Control Position 0=Mid, 1=Open, 2=Closed

14 Bypass Flow Control Position Degrees of Opening

15 3-Way Valve Control Position 0=Mid, 1=DHW, 2=CH

16 3-Way Valve Control Cycles x100

MODE

Eco

MODE

Eco

MODE

Eco

MODE

Eco

1

MODE 2

Eco

1

3 See “Electrical Diagnostics” section of this document.

3 Eco Eco

MODE MODE

4

2 3

4

5. To exit parameter settings and enter normal operation mode, press either the red

button on the PC Board or the “Mode” button on the controller.

COMPONENT WIRE COLOR VOLTAGE RESISTANCE PCB

Connector PIN

Power Supply Black-White 108-132 VAC N/A CN24 1-3

Flame Rod Yellow-Body More than 2 VAC2 N/A CN1 2

Spark Electrode Red-Black 11-14 VDC2 N/A CN1 11-22

Combustion Fan

Red-Black 7-48 VDC2 N/A CN1 3-5

White-Black 2-14 VDC2 N/A CN1 5-9

Yellow-Black 11-14 VDC N/A CN1 5-7

Water Flow Control Device

Red-Pink N/A 40-60Ω

CN1 18-20

White-Blue CN1 14-16

Grey-Orange 11-14 VDC N/A CN1 11-29

Brown-Grey Servo Valve Fully Open or Closed: Less than 1 VDC Servo Valve in a Mid Position: 4-6 VDC N/A CN1 25-29

Venturi Control Device

Blue-White N/A 33-43Ω

CN1 17-19

Yellow-Red (No.9) CN1 13-15

Black-Red (No.3) 11-14 VDC

N/A

CN1 11-29

Black-Brown Close Position: Less than 1 VDC Open Position: 4-6 VDC CN1 26-29

Black-Grey Close Position: 4-6 VDC Open Position: Less than 1 VDC CN1 24-29

By-Pass Flow Control Device Red-Pink

N/A 40-60Ω CN1 10-12

White-Blue CN1 6-8

3-way Valve

Brown-Grey Servo Valve Fully Open or Closed: Less than 1 VDC Servo Valve in a Mid Position: 4-6 VDC N/A

CN1 23-29

Orange-Grey 11～14 VDC CN1 11-29

Pink-Red N/A 40-60Ω

CN11 1-2

White-Blue CN11 3-4

Gas Solenoid Valve Yellow-Black 11-14 VDC2 15-25Ω CN1 28-30

Outgoing Thermistor White-White

N/A

59°F: 11.4-14kΩ 86°F: 6.4-7.8kΩ

113°F: 3.6-4.5kΩ 140°F: 2.2-2.7kΩ 221°F: 0.6-0.8kΩ

Disconnect the connector and measure at thermistor side.

CN11 18-19

White-White CN11 10-13

Inlet Thermistor White-White CN11 17-19

Exhaust Thermistor White-White CN11 16-19

Heat Exchanger Thermistor White-White CN11 15-19

Supply Thermistor White-White CN11 12-19

Return Thermistor White-White CN11 10-20

Freeze Protection Thermistor Black-Black 32°F: 38k-43k 50°F: 22k-26k 68°F: 14k-17k Disconnect the connector and measure at thermistor side. CN11 10-14

Transformer White-Grey 108-132 VAC

N/A CN18 1-2

Red-Red 20-30 VAC (possible to measure at Output terminal as substitute position) CN18 3-4

Overheat Switch Black-Black Less than 1 VDC Less than 1Ω 7(CN11)-27(CN1)

Water Flow Sensor Black-Red 11-14 VDC

N/A CN1 11-29

Yellow-Black 4-7 VDC2 More than 6 Hz (0.26 GPM) 9(CN11)-29(CN1)

Water Pressure Sensor Red-Black 11-14 VDC

N/A CN1 11-29

Yellow-Black 0 kPa: 655-745 mV; 200 kPa: 2,155-2,245 mV; 400 kPa: 3,655-3,745 mV 6(CN11)-29(CHN1)

Water Level Electrode White-White 11-14 VDC N/A 8(CN11)-29(CN1)

Integrated Pump White-Black 108-132 VAC N/A CN21 1-2

Air Handler Red-Black 11-14 VDC N/A CN8 1-2

Control Panel Black-Black 11-14 VDC N/A CN2 1-4

Additional Controller(s) White-White 11-14 VDC N/A CN29 1-3

Important Safety Notes

There are a number of (live) tests required when performing electrical diagnostics on this product. Proceed with caution at all times to avoid contact with energized components inside the boiler. Only trained and qualified service technicians should attempt to repair this product. Before checking for resistance readings, disconnect the power source to the unit and isolate the item from the circuit (unplug it).

Electrical Diagram

Refer to the Wiring Diagram attached to the back of the boiler front cover.

Flame Rod

Place one lead of your meter to the flame rod and the other to the ground. When the unit is attempting to ignite, you should read more than 2 VAC.

Amp Fuses

This unit has two (10) amp glass fuses located on the PC Board. Remove the fuses and check continuity through it. If you have continuity through each fuse, then it is functioning. Otherwise, the fuse is blown and must be replaced.

no. 02 6.8

PC Board

01-A 11-A

4. Press the (Up) or (Down) arrows to change the selection for the setting

number (such as 11-A or 11-b). Then, press the “Select” button (Fig 8).

11-

Parameter Number Setting Description

Selection Record date and parameter when individual parameters have been adjusted factory default.

Parameter Value Date Adjusted Parameter Value Date Adjusted A b C d

00 Pressure Indication on the Control Panel.

Yes No

The current pressure will cycle on the controller display.

01 Outdoor Reset Curve.

Curve 1 Curve 2 Curve 3 Curve 4 This parameter is available when Dip Switch 1 is in the OFF (default) position. Select the proper curve from below.

02

Boost No 30

Minutes 60

Minutes

This parameter is available when Dip Switch 1 is in the OFF (default) position. Boost Mode increases the CH set temperature above the outdoor reset curve target when the boiler has been running on an unusually long call for heat.

03 Maximum Outdoor Temperature at which the Boiler will Fire in CH Mode. No

Maximum 77°F (25°C)

Parameter is available when DIP switch 1 is in the OFF (default) position. This sets the maximum outdoor temperature the boiler will fire in CH mode.

10 Maximum DHW Set Point Temperature.

120°F (49°C) 140°F (60°C) This selects the maximum DHW set point temperature.

11 How Long Diverter Valve is in DHW Position.

3 Minutes 10 Seconds This selects the length of time the 3-way valve will stay in the DHW position after using DHW even if a CH demand is present.

12 DHW Recirculation Piping Setup. Crossover Valve

Dedicated Return

This parameter is available when DIP switch 3 is in the ON position. Ensure this setting corresponds to the DHW recirculation piping.

13 DHW Recirculation with Timer Relay Input.

Yes No This parameter is available when DIP switch 3 is in the ON position. This enables an external timer to also control the timing for DWH recirculation to more directly correspond to the customers needs.

14

CH Temperature Limitation During Simultaneous Operation. Yes No

This parameter is available when DIP switch 3 or 4 is in the ON position. This enables the CH temperature setting to be limited during simultaneous DHW and CH operation.

15

3-Way Valve Position During Simultaneous Operation. Normal Additional CH

This parameter is available when DIP switch 3 or 4 is in the ON position. This adjusts the 3-way valve position to open the CH side more for when the flow of the CH side is reduced due to DHW demand. This may restrict the DHW capacity.

16 LC (Limescale Condition) Check.

Available No Detection This setting enables the boiler to check for limescale conditions in the DHW side of the plate heat exchanger.

17 Adjust DHW Temperature Setting.

0°F (0°C) 1.8°F (1°C) 3.6°F (2°C)

5.4°F (3°C)

Enables the DHW output temperature to be adjusted without adjusting the set point temperature to make up for system temperature losses.

18 DHW Continuous Operation Time. 120 Minutes

60 Minutes

180 Minutes Unlimited

This setting adjusts the maximum continuous operating time of DHW, whether in DHW priority or simultaneous modes.

40 Linked Operation Between CH Pump 1 and 2.

No Yes (Linked Together) This parameter enables linked operation between the CH Pump 1 and 2.

41 Linked Operation Between Main Boiler Pump and CH Pump 1.

No Yes (Linked Together) (If selected, hydraulic

This enables the linked operation between the main boiler pump and CH pump 1.

42 Main Pump Runs When the Target Temperature is Achieved.

Continuously Intervals This selects the mode of the main pump running when the target setpoint is achieved.

43 External Pump Runs When the Setpoint Temperature is Achieved. Same as Main Pump Does Not Run

This selects the mode of the external pump(s) running when the target setpoint is achieved.

44 External Pump Runs When Freeze Protection is in Operation. Does Not

Run Same as Main Pump This selects how the external pump operates when freeze protection is in operation.

45 Freeze Protection Level. Default When Boiler is Installed

This selects the freeze protection level. Selecting “B” will prevent the boiler from operating in freeze protection mode more than necessary.

46

The Differential Temperature from Ceasing Fire to Firing Again. Normal Quick

How much temperature drop is permitted by the supply water thermistor before the boiler will fire again. CH Setting Temperature. Temperature Drop 168-182°F (75-82°C) 27°F (15°C) 15°F (8°C) 104-166°F (40-74°C) 15°F (8°C) 9°F (5°C)

47 The Time Which the Boiler is not Allowed to Fire Again for CH. Normal

(3 Minutes) Quick

(10 Seconds)

This selects the time which the boiler will not be able to fire again for CH after the burner has shutdown.

49 Will the boiler shut down on a high return water temperature.

Yes No This setting is for whether the boiler will shut down at high return water temperatures.

60 Not Available. Not Available

A0 Gas Type.

Natural Gas Liquid Propane For selecting gas type when conducting gas conversion.

A1 Not Available. Not Available

A2

Vent Material Used. PVC Material other than

PVC: CPVC/PP/Other

This selects the venting material used. The boiler is set from the factory to be installed in a PVC venting system. If CPVC, PP, or other approved venting is used, this may be adjusted. See section “5.4 PVC Venting Safety Switch” for more information.

ELECTRICAL DIAGNOSTICS

# Data Unit 17 Venturi Position 0=Closed, 1=Open

18 Venturi Cycles x100

20 Pump Cycles x100

21 Pump Hours x10

22 Pump for Boiler 0=OFF, 1=ON

23 Pump for System (Pump 1) 0=OFF, 1=ON

24 Pump for System (Pump 2) 0=OFF, 1=ON

31 Outdoor Temperature °F/°C1

32 Additional Controllers Connected See Table 3

40 Energization Hours x100

41 Combustion Hours x10

42 Combustion Cycles x100

43 Combustion Hours (DHW) x10

44 Combustion Cycles (DHW) x100

45 Commissioning Cycles x1

CH DHW Units of

Measurement Temp. Water Flow Pressure

1: English °F gal/min psi

2: Metric °C L/min bar

Units of Measurement

1. Press the “Mode” button.

2. Press the (Up) or (Down) arrows to select a unit of measurement (refer to Table 2).

For more information on parameter settings, refer to the I-Series Condensing Boiler Installation and Operation Manual.

ALTITUDE DIP

Switch 6 DIP

Switch 7

0-2,000 ft (0-610 m) (Default) OFF OFF

2,001-5,400 ft (610-1,646 m) ON OFF

5,401-7,700 ft (1,646-2,347 m) OFF ON

7,701-10,200 ft (2,347-3,109 m) ON ON

DIP Switches (Section 12 in Manual and Table 5 below)

# DIP Switch Function

1

Outdoor Temperature Sensor: Enables or disables outdoor temperature sensor. OFF (Default): Outdoor Temperature Sensor in Use ON: Outdoor Temperature Sensor Not in Use

2 Thermostat Usage: Changes mode between Thermostat Usage and Central Heating (CH) Button. OFF (Default): Thermostat Used ON: CH button used. Boiler fires based on return water temperature

3 DHW Recirculation: Enables DHW Recirculation function for Pump 2 connection. OFF (Default): Pump 2 Connection Enabled for Second CH Zone Pump ON: DHW recirculation ON (Pump 2 connection for DHW Recirculation Pump)

4 Simultaneous CH and DHW: Enables simultaneous operation between CH and DHW. OFF (Default): DHW Priority; ON: Simultaneous CH and DHW Permitted

5 Gas Valve Solenoid: Manually shuts down the integrated solenoid gas valve. OFF (Default): Normal Operation; ON: Fixed Closed (prevents boiler operation)

6 Altitude Setting: Sets the appropriate elevation of the boiler installation. OFF/ON: Depends on Altitude. See “Table 6. High Altitude DIP Switches” for specific DIP switch settings.

7 Altitude Setting: Sets the appropriate elevation of the boiler installation. OFF/ON: Depends on Altitude. See “Table 6. High Altitude DIP Switches” for specific DIP switch settings.

8 Vent Type Selection: Selects the venting material used. The boiler is set from the factory to be installed in a PVC venting system. If CPVC, PP, or other approved venting is used, this setting may be adjusted. See Section 5 in Manual for more information. OFF (Default): PVC ON: Higher Temperature Exhaust Vent Material (PP, CPVC, or Stainless Steel)

SW1 Forced Hi/Low Fire Modes (Section 12 in Manual)

SW2 Deaeration Mode (Section 10 in Manual)

SW3 Data Transfer Mode (Transfers PC Board data when replacing PC Board. Refer to instructions included in replacement parts.)

SW4 Parameter Settings (Section 12 in Manual)

OFF

ON

Power Reset

Heat Exchanger Overheat (140), Venturi Control (150), High Exhaust Temperature (540), and Freeze issue (890) can be reset by shutting down power to the boiler.

Interlock Reset Venturi (170) and Solenoid Valve Circuit (520) can be reset by pushing and holding buttons SW1 and 2 for five seconds.

Combustion Error During DHW Error can be reset by closing faucet.

Other Reset Other error can be reset by Domestic “On/Off” button or “Central Heating” (CH) button.

DIP SWITCHES

Controllers Connected

Controller Model Connected Not Connected

Controller Panel _ _ _ 1 ―

Additional Controller (BC) _ _ 1 _ _ _ 0 _

Additional Controller (BSC) _ 1 _ _ _ 0 _ _

Additional Controller (BSC2) 1 _ _ _ 0 _ _ _

Table 2. Units of Measurement

Table 3. Connecting Additional Controllers

Table 4. Diagnostic Points

Table 7. Parameter Settings

Table 5. DIP Switch Functions Table 6. High Altitude DIP Switches

Table 8. Error Reset

Table 9. Diagnostic Codes

Fig 1. “Down” and “DHW” Buttons Fig 2. “Up” and “Down” Buttons

Fig 7. “Up,” “Down” and “Select” Buttons

Fig 4. PC Board DIP Switches and Buttons

Fig 5. Red Button on PC Board

Fig 6. “Mode” Button

Fig 8. “Up,” “Down” and “Select” Buttons

Fig 9. “Up” and “DHW” Buttons

Fig 3. Data Appearing in Display

Note: BC, BSC and BSC2 are PCB recognition position.

06/2020 800000115(02)

2 When the unit is operating.

1 See “Units of Measurement” section to the right.

1

021 Continuous DHW

• This code will display when DHW is in continuous operation for extended periods of time. Ensure there are no open faucets.

• Ensure there are no leaks in fixtures or the plumbing system.

100 Air Supply or Exhaust Blockage/Condensate Trap is Full

• Fan current initial check error. • Ensure condensate line and trap is not blocked. • Ensure internal air filter is clean with no obstructions. • Ensure high altitude setting is set properly (See Table 6. High Altitude DIP Switches). • Ensure combustion air and exhaust vents are not blocked and the approved venting

materials are being used. • Ensure either the exhaust ring or intake cap is removed properly. • Ensure vent length is within limits. • Check fan for debris and ensure wheel turns freely. • Verify fan check valve is not stuck between fan casing and burner body.

110 No Ignition (Unit Not Turning On)

• Ignition Error. • Check that the gas is turned on at the boiler, gas meter, and/or propane cylinder. • If the unit is installed in a propane system, ensure that gas is in the tank. • Bleed all air from the gas lines. • Check the ground wire for the PC Board. • Ensure the flame rod wire is connected. • Ensure the igniter is operational.3 • Ensure the venting is installed in accordance with the I-Series Boiler Installation and

Operation manual. • Check that the surface of the electrode and flame rod are clean. • Check gas solenoid valves for open or short circuits.3 • Verify gas orifice installed is correct for the gas system the unit is installed in. • Check flame rod voltage to ground during ignition.

120 Flame Failure

• Boiler has flame failure. • Check that the gas is turned on at the boiler, gas meter, and/or propane cylinder. • If the unit is installed in a propane system, ensure that gas is in the tank. • Ensure the venting is installed in accordance with the I-Series Boiler Installation and

Operation Manual. • Ensure the flame rod wire is connected. • Ensure the gas type and inlet gas pressure are correct. • Bleed all air from the gas lines. • Check the ground wire to the PC Board. • Check flame rod voltage to ground during ignition.

140 Heat Exchanger Overheat

• Overheat switch is tripped. • Measure the resistance of the Overheat Switch.3 • Check the heat exchanger surface for hot spots which may indicate blockage due to

scale buildup. • Ensure the boiler pump is not locked up. • Ensure that all of the valves in the CH circuit are open. • Ensure the boiler and CH circuit does not have a freezing condition. • The surface of the heat exchanger may turn to a black color as stainless steel is

tempered even in normal conditions. This does not indicate an abnormal condition. • Check for damage on the exhaust, seal, and venting. • Ensure the parameter A0 corresponds to the gas type the unit is installed in. • Ensure the gas orifice is the proper orifice for the gas type in use. • Ensure deaeration has been performed.

150 Venturi Control

• Venturi operation error. • Ensure the venturi motor is operating correctly.3 • Replace the gas valve assembly.

161 High Outgoing Temperature

• Safety shutdown because DHW outgoing temperature is too hot. • Check sensor wiring for damage of outgoing thermistor. • Measure resistance of outgoing thermistor.3 • Ensure the gas valve has no damage and the orifice is installed correctly. • Replace the gas valve assembly.

170 Venturi Blockage

• Check the venturi and silencer for blockage. • Before resetting this error, check if the condensate drain is blocked and if the

venting is connected properly.

190 Electrical Grounding

• Secondary circuit ground fault. • Check all electrical components for electrical short.

250 Condensate Pump (Accessory)

• Boiler will operate for 60 seconds. • Confirm wire connections and harnesses are good. • Ensure the condensate reservoir is empty and condensate pump is operational.

310 Freeze Protection Thermistor

• Check sensor wiring for damage. • Measure the resistance of the sensor. Replace if necessary.

321 Outgoing Thermistor

• Check sensor wiring for damage. • Clean sensor of any scale buildup present. • Measure the resistance of the sensor. Replace if necessary.

331 Heat Exchanger Thermistor

• Check sensor wiring for damage. • Measure the resistance of the sensor. Replace if necessary.

341 Inlet Thermistor

• Check sensor wiring for damage. • Measure the resistance of the sensor. Replace if necessary.

353 Supply Thermistor

• Check sensor wiring for damage. • Clean the surface of the sensor. • Measure the resistance of the sensor. • Check the return thermistor. Replace if necessary.

380 Exhaust Thermistor

• Check sensor wiring for damage. • Clean the surface of the sensor. • Measure the resistance of the sensor. • Check the return thermistor. Replace if necessary.

363 Return Thermistor

• Check sensor wiring for damage. • Measure the resistance of the sensor. Replace if necessary.

393 Outdoor Thermistor

• Ensure that DIP switch 1 is set to the appropriate position. • Check sensor wiring for damage. • Measure the resistance of the sensor. Replace if necessary.

400 Pressure Sensor

• Check sensor wiring for damage. • Measure the voltage of the sensor. • Replace if necessary.

430 High/Low Water Pressure

• If the water pressure is too low, add water into the system until at least 13 PSI is observed.

• Ensure there are no leaking components in the CH system. • If the pressure is too high, adjust the pressure to a maximum of 30 PSI. • Ensure the pressure relief valve and water fill are working correctly. • Ensure deaeration has been performed.

443 Low Water Cut-Off (LWCO)

• Ensure the LWCO device is working correctly. • Ensure the LWCO jumper is connected properly when LWCO is not in use. • Ensure the output is 24 VAC on the PCB. If it is not, check the transformer harness

and output of transformer.

520 Solenoid Valve Circuit

• Check the flame rod and wire for damage. • Close the gas shut off valve installed near the boiler. • Ensure the flame rod and wire are not wet. • Check the output from the PC Board to the solenoid gas valve.

- If the output from the PC Board is abnormal, replace the PC Board. - If the output from the PC Board is normal, replace the gas control.

540 High Exhaust Temperature

• Check the exhaust thermistor wiring for damage. • Clean the surface of the thermistor. • Measure the resistance of the exhaust thermistor.3 • If the sensor has been replaced and the error still appears, check the return

thermistor. • If the boiler is used in a hard water area, flush the DHW plate heat exchanger. • Check the exhaust duct, seal, and venting for damage.

610 Combustion Fan

• Check the motor wire harness for loose or damaged connections. • Measure resistance and voltage of motor wire harness.3 • Ensure the combustion fan spins freely.

631 DHW Recirculation Pump

• Ensure the DHW recirculation matches the Parameter 12 setting as described in “Table 7. Parameter Settings.”

• Ensure the dedicated return line is properly installed. • Ensure the inlet water filter and bypass filter are clean and free of debris. • Ensure the DHW recirculation pump is connected to the DHW Pump

Terminal. • Ensure the capacity of the recirculation pump is sized appropriately for the

piping (DHW recirculation pump should be higher than 1.3 GPM). • Ensure air is removed from the recirculation line.

651 Water Flow Control

• Measure the resistance values and voltage of the water flow control.3 • Ensure the harness and connector are not wet. • If the voltage from the PC Board is abnormal, replace the PC Board;

otherwise, replace the water flow servo valve. 661 Bypass

• Measure the resistance values and voltage of the bypass servo valve.3 • Ensure the harness and connector are not wet. • If the voltage from the PC Board is abnormal, replace the PC Board;

otherwise, replace the bypass servo valve.

670 3-Way Valve

• Measure the resistance values and voltage of the 3-way valve control.3 • Replace the 3-way valve control device. • Check the CH system water quality to confirm it is within recommended

range and to prevent valve failures.

681 Hot Water Supply Temperature Abnormality

• If the DHW water temperature is higher than the set point temperature because the boiler bypass servo fails to close.

• Measure resistance values and voltage of the bypass flow control.3 • Replace the bypass flow control device if needed; otherwise, check the inlet

thermistor and heat exchanger thermistor wiring for damage. • Measure the resistance of the sensor. • Clean the sensor of any scale buildup present. • Replace if needed.

700 PC Board

• PC Board circuit error. • Replace PC Board.

710 Solenoid Valve Circuit

• Ensure Dip switch 5 on the PC Board is in the OFF position (default). • Ensure the gas control wire is not loose or damaged. • Replace the PC Board.

720 Flame Rod

• Check the flame rod and wire for damage. • Ensure the flame rod and wire are not wet. • If there is no issue with the flame rod or wiring, replace the PC Board.

890 Freeze Issue

• The boiler checks the heat exchanger temperature at the time of operation. • If the temperature is too low, an error will occur. • Check if there is freezing in the boiler or CH system.

999 PC Board Mismatch

• This code occurs when the PC Board and the internal logic do not match. • Check if the software versions of the board and operation board do not

match.

LC Scale Buildup in Heat Exchanger

• Flush the DHW plate heat exchanger. • The LC code will reset automatically when scaling is removed. If the LC code

remains, check the DHW thermistor, flow sensor or boiler pump.

FFF Maintenance Indicator

• This code is a placeholder in diagnostic code history indicating a service provider performed maintenance or service. Enter this code after performing service by pressing the following buttons at the same time: Up, Down, and DHW. “FFF” appears on the monitor (Fig 10).

No Code Nothing happens when DHW water flow is activated

• Verify the minimum flow rate required to fire the boiler is seen. • Measure the resistance of the flow control sensor.3 • Clean the inlet water supply filter. • On new installations, ensure the hot and cold water lines are not reversed. • Confirm the inlet water temperature is not too high. • Ensure the integrated boiler pump operates properly. • Ensure the DHW operation switch is on.

No Code Decreasing or fluctuating DHW water flow volume

• Ensure the gas pressure is proper. • Ensure the water pressure is proper. • Ensure the inlet water filter for DHW is clean. • Ensure there is no limescale buildup present. • Ensure the vent and vent settings are properly set up. • If a DHW recirculation system is used, the DHW flow volume may vary slightly. • Ensure all air has been purged from the system. • Ensure the pump is set to speed 3. • During simultaneous CH and DHW operation mode, it is possible to see

decreased DHW flow.

No Code Fluctuating DHW outgoing temperature

• Ensure the gas pressure is proper. • Ensure the water pressure is proper. • Ensure the DHW thermistor, flow servo, and bypass servo are in good

condition. • Ensure the inlet filter for DHW is clean. • If a DHW recirculation system is used, the DHW temperature may vary slightly. • Ensure all air is removed from the system.

No Code Boiler does not start heating with a heating demand present

• Supply temperature or return temperature inside the boiler may be too hot. • Ensure the pump operates properly. • If there is a demand immediately after using DHW, wait at least three minutes

for operation. No

Code The boiler does not operate with the CH setting button

• If DIP switch 2 is OFF, CH operation (the light on the CH button is off) will

function via the room thermostat. No

Code DHW recirculation does not begin

• Ensure the DHW recirculation pump is connected to the DHW_Pump terminal. • Ensure DIP switch 3 is ON. • Ensure the DHW recirculation plumbing type is set properly per Parameter 12

as described in “Table 7. Parameter Settings.” • Ensure the DHW recirculation with timer relay input is set properly per

Parameter 13 as described in “Table 7. Parameter Settings.” • Ensure the wiring to the external timer is correct. • Ensure the external timer is ON, if in use. • The recirculation logic has an OFF interval after use.

No Code Simultaneous DHW and CH is not functional

• Ensure DIP switch 4 is ON. • If CH set point temperature is lower than 140°F, it is not permitted (this

includes outdoor reset temperature settings). • Ensure the DHW inlet temperature is not too hot. • Ensure the heating load for DHW and CH are within limits to handle both

simultaneously. No

Code Cannot change the DHW set point temperature

• When DHW is being produced, the temperature setting can only be adjusted between 98°F and 110°F.

No Code Supply temperature is different from the setting temperature on the controller

• During outdoor sensor control, the supply temperature will vary dependent on the outdoor temperature.

• During simultaneous operation of DHW and CH, the supply temperature for CH is based on DHW control.

No Code CH capacity is insufficient

• Ensure the parameters are properly set for the installation. • During simultaneous operation of DHW and CH, flow volume to heating can be

reduced. No

Code Pump or fan is operating even with no demand

• The boiler may start or operate the pump for freeze protection operation. • The pump may intermittently operate to prevent it from becoming stuck.

No Code Cannot turn off ECO mode

• During DHW recirculation, ECO switch will always be on.

Fig 10. “Up,” “Down” and “DHW” Buttons

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ntact R

inn

ai at 1-8

00

-62

1-9

41

9 o

r visit ww

w.rin

nai.u

s

21

3

Exhau

st Gasket - 2

inch

1

09

00

06

23

1

1

1

21

5

Air Su

pp

ly Pip

e Seal Rin

g 1

08

00

00

17

1

1

1

22

0

Air Su

pp

ly Bo

x 1

08

00

00

85

1

1

1

22

1

Air Su

pp

ly Filter (set) 1

08

00

00

86

1

1

1

22

2

Air Su

pp

ly Asse

mb

ly 1

08

00

00

87

1

1

1

22

3

Air Su

pp

ly Gasket - 2

inch

1

09

00

06

24

1

1

1

40

0

3/4

DH

W C

old

Co

nn

ectio

n

80

70

00

17

7

1

1

1

40

1

Water Su

pp

ly Filter Plu

g Asse

mb

ly 1

07

00

03

17

1

1

1

40

2

Recti

fier (4

02

) V2

53

2Ffu

W/W

C/2

52

6W

M

8D

1-1

5

1

1

1

40

3

Water Flo

w Servo

and

Senso

r Assem

bly

80

70

00

17

8

1

1

1

40

5

Byp

ass Tub

e

80

70

00

17

9

1

1

1

40

6

Byp

ass Servo A

ssemb

ly 8

07

00

01

80

1

1

1

40

7

Co

ver

10

70

00

09

3

3

3

3

40

9

Flow

Turb

ine A

ssem

bly

80

70

00

18

1

1

1

1

41

0

CH

Ou

tlet Co

nn

ectio

n

80

70

00

18

2

2

2

2

41

1

Plate H

EX-Large

80

70

00

18

3

1

41

2

Plate H

EX-M

ediu

m

80

70

00

18

4

1

1

41

3

Water P

ressu

re Senso

r Asse

mb

ly 8

07

00

01

85

1

1

1

41

4

Plu

g Ban

d

10

90

00

01

8

1

1

1

41

5

Plate H

EX-C

H H

eatin

g Co

nn

ectio

n

80

70

00

18

6

1

1

1

41

7

3-W

ay Valve A

ssemb

ly 8

07

00

01

87

1

1

1

41

8

Circu

latio

n P

um

p A

ssemb

ly 8

07

00

01

88

1

1

1

41

9

Pu

mp

Co

nn

ectio

n A

ssemb

ly 8

07

00

01

89

1

1

1

42

0

Pu

mp

-Plate H

EX C

on

necti

on

Tub

e

80

70

00

19

0

1

1

1

42

1

Pu

mp

Stand

8

07

00

01

91

1

1

1

43

0

DH

W O

utlet Tu

be

8

07

00

01

92

1

1

1

43

1

Heat Exch

anger P

ipe C

on

necti

on

8

07

00

01

93

1

43

2

DH

W O

utlet

80

70

00

19

4

1

1

1

43

5

Trap D

rain P

lug A

ssy 8

07

00

01

95

1

1

1

44

0

HEX

-CH

Heati

ng C

on

necti

on

Pip

e

80

70

00

19

6

1

1

1

44

1

Heat Exch

anger P

ipe C

on

necti

on

Assy-M

ediu

m

80

70

00

19

7

1

1

44

3

Secon

dary H

eat Exchan

ger Ou

tlet Fittin

g 8

07

00

01

98

1

1

1

44

4

Secon

dary H

eat Exchan

ger Inlet Fitti

ng

80

70

00

19

9

1

1

1

44

5

Prim

ary-Secon

dary P

ipe A

ssy-Large

80

70

00

20

0

1

44

6

Prim

ary-Secon

dary P

ipe A

ssy-Med

ium

8

07

00

02

01

1

1

44

7

Prim

ary-Secon

dary C

on

necti

ng Fitti

ng

80

70

00

20

2

1

45

0

Pip

e Bracket

U2

11

-32

2X

01

1

1

1

45

1

Pip

e Bracket

80

90

00

16

8

2

1

1

45

2

Reten

tio

n C

lip

80

90

00

16

9

2

1

1

45

3

Pip

e Bracket

80

90

00

17

0

1

1

1

45

4

Clip

8

09

00

01

71

2

2

2

46

0

Therm

istor Sen

sor

80

50

00

07

9

1

1

1

46

1

Therm

istor Sen

sor

80

50

00

08

0

1

1

1

46

2

Therm

istor Sen

sor

80

50

00

08

1

1

1

1

46

3

Therm

istor Sen

sor

80

50

00

08

2

1

1

1

46

4

TWIN

Therm

istor

80

50

00

08

3

1

1

1

47

0

O-rin

g 8

07

00

02

15

3

3

3

47

1

O-rin

g 8

07

00

02

03

3

3

3

47

2

O-rin

g 8

07

00

02

04

1

4

13

1

3

47

3

O-rin

g 8

07

00

02

05

2

2

2

47

5

O-rin

g Water H

eater 2 K

T

M1

0B

-2-4

2

2

2

47

6

O-rin

g M

10

B-2

-14

2

2

2

47

7

O-rin

g KT

M1

0B

-2-1

6

2

2

2

47

8

O-rin

g, All W

ater Heaters 2

KT

M

10

B-2

-18

1

1

1

47

9

O-rin

g 8

07

00

02

06

2

2

2

48

0

O-rin

g 8

07

00

02

07

1

1

1

50

0

Clip

1

09

00

06

36

1

1

1

50

1

Clip

8

09

00

01

72

4

4

4

50

2

Clip

8

09

00

01

73

2

2

2

50

4

Clip

(i09

0C

and

i06

0C

on

ly) 8

09

00

01

74

1

1

50

5

Clip

1

09

00

06

39

2

2

2

50

6

Clip

1

09

00

06

38

6

6

6

70

0

PC

Bo

ard A

ssem

bly-C

om

bi

80

50

00

08

4

1

1

1

70

1

PC

B C

over

80

90

00

17

5

1

1

1

70

2

Integrated

Re

mo

te Co

ntro

l Assy

80

50

00

08

5

1

1

1

70

5

Transfo

rme

r 8

05

00

00

86

1

1

1

71

0

Po

wer C

ord

Assem

bly FF

10

50

00

23

8

1

1

1

71

2

Senso

r Harn

ess

80

50

00

08

7

1

1

1

71

4

Heater G

rou

nd

Harn

ess 8

05

00

00

88

1

1

1

71

5

Pu

mp

Harn

ess 8

05

00

00

89

1

1

1

71

6

Over H

eat Switch

1

05

00

02

99

1

1

1

71

7

Water P

ressu

re Co

nn

ectio

n H

arness

80

50

00

09

0

1

1

1

71

8

Therm

istor Sen

sor

80

50

00

09

1

1

1

1

71

9

Igniter G

rou

nd

Harn

ess 1

05

00

02

43

1

1

1

72

0

Gu

ide Seal

80

90

00

17

6

1

1

1

75

0

Rem

ote C

on

trol H

arness

10

50

00

24

9

1

1

1

80

0

Screw

1

09

00

07

46

4

4

4

80

1

Screw

C

P-3

05

83

2

2

2

80

2

Screw

ZB

A0

40

8U

K

3

3

3

80

3

Screw

C

P-3

05

80

1

7

15

1

5

80

4

Screw

1

09

00

06

48

3

3

3

80

7

Screw

U

21

7-4

49

5

5

5

80

8

Screw

1

09

00

06

41

3

3

3

81

0

Screw

1

09

00

01

79

8

8

8

81

1

Screw

1

08

00

00

21

2

2

2

81

3

Screw

ZA

D0

40

8U

K

2

2

2

81

4

Screw

1

09

00

06

51

6

6

6

81

6

Screw

C

P-2

08

83

-41

0U

K

1

1

1

81

8

Screw

ZFA

B0

40

8SZ

2

2

2

81

9

Therm

istor Scre

w

ZFAB

04

06

UK

2

2

2

82

0

Screw

8

09

00

01

77

2

2

22

2

2

82

1

Truss Screw

1

09

00

05

98

1

8

18

1

8

82

2

Screw

8

09

00

01

78

4

4

4

82

3

Screw

ZA

A0

40

8U

K

3

2

2

82

4

Screw

8

09

00

01

79

1

1

1

82

5

Gro

un

d Screw

1

09

00

07

93

4

4

4

82

6

Screw

8

09

00

01

80

1

1

1

82

7

Screw

8

09

00

01

81

2

2

2

82

8

Screw

8

09

00

01

82

8

8

8

83

0

Cab

le Clip

8

09

00

01

83

1

1

1

86

0

Wall B

racket 1

09

00

06

28

1

1

1

86

1

Ven

t Screen

Set 1

08

00

01

04

1

1

1

86

2

LP C

on

version

Orifi

ce-In

clud

ed

80

60

00

05

5

1

1

1

86

3

Pressu

re Relie

f Valve

8

07

00

02

11

1

1

1

86

4

Ou

tdo

or Tem

peratu

re Senso

r 8

05

00

00

96

1

1

1

88

8

User m

anu

al 8

00

00

01

14

1

1

1

88

9

Installati

on

and

Op

eratio

n M

anu

al 8

00

00

01

11

1

1

1

89

0

Tech sh

eet 8

00

00

01

15

1

1

1

89

1

User M

anu

al-French

8

00

00

01

45

1

1

1

89

2

Installati

on

and

Op

eratio

n M

anu

al-French

8

00

00

01

46

1

1

1

ITEM

DESCRIPTION

PART

NUMBER

i090C

i060C

i120C

ITEM

DESCRIPTION

PART

NUMBER

i090C

i060C

i120C

00

3

Low

er Wall M

ou

nt B

racket 1

09

00

02

81

1

1

1

00

4

Up

per W

all Mo

un

t Bracket

10

90

00

59

4

1

1

1

00

7

Co

nn

ectio

n R

ein

force

men

t Plate

8

09

00

01

65

1

1

1

00

8

Ru

bb

er Bu

shin

g C

F79

-41

02

0-A

3

3

3

01

0

Resid

enti

al Screw an

d W

asher

10

60

00

64

5

4

4

4

01

2

Co

mb

usti

on

Ch

amb

er Sup

po

rt Plate

1

09

00

05

97

2

2

2

01

5

Igniter B

racket 1

09

00

05

99

1

1

1

01

6

Igniter A

ssem

bly

10

50

00

23

0

1

1

1

01

7

Gro

un

din

g Screw

C

P-8

04

52

1

1

1

01

8

Plate H

EX B

racket 8

09

00

01

66

1

1

1

04

0

Fron

t Pan

el Assy

80

90

00

16

7

1

1

1

04

4

Screw

Co

ver 1

09

00

02

30

2

2

2

04

5

Fron

t Pan

el Packin

g-Top

1

09

00

01

20

2

2

2

04

6

Fron

t Pan

el Packin

g-Side FF

10

90

00

60

8

2

2

2

10

0

Bu

rner A

ssem

bly-Large

8

06

00

00

49

1

10

1

Bu

rner G

asket-Large

10

90

00

60

9

1

10

2

Bu

rner P

late Assem

bly-Large

8

06

00

00

50

1

10

3

Co

mb

usti

on

Ch

eck Valve A

ssem

bly

10

70

00

26

2

1

1

1

10

5

Bu

rner A

ssem

bly-M

ediu

m

80

60

00

05

1

1

1

10

6

Bu

rner G

asket-Med

ium

1

09

00

06

10

1

1

10

7

Bu

rner P

late Assem

bly-M

ediu

m

80

60

00

05

2

1

1

11

0

Co

mb

usti

on

Fan A

ssemb

ly 1

08

00

00

81

1

1

1

11

1

Fan M

ou

nti

ng P

acking

10

90

00

61

1

1

1

1

11

2

O-rin

g 1

09

00

06

12

1

1

1

11

3

Hexago

n H

ead Scre

w

ZQA

A0

51

4U

K

3

3

3

11

4

Gas V

alve Asse

mb

ly 1

06

00

01

17

1

1

1

11

5

O-rin

g 1

09

00

02

52

2

2

2

11

6

Gas C

on

ne

ctio

n P

ipe

8

06

00

00

54

1

1

1

11

7

Gas Tu

be B

racket 1

09

00

06

35

1

1

1

11

8

Inlet G

as Sup

ply C

on

necti

on

1

06

00

01

19

1

1

1

11

9

Inlet G

as Test P

ort Scre

w

10

60

00

13

8

2

2

2

12

0

O-rin

g M

10

B-1

3-4

2

2

2

12

1

No

ise Filter 1

06

00

01

20

1

1

1

13

0

Heat Exch

anger A

ssem

bly-Large

8

07

00

01

73

1

13

1

Heat Exch

anger A

ssem

bly-M

ed

ium

8

07

00

01

74

1

1

13

6

OH

S Bracket

10

90

00

61

4

1

1

1

14

5

Co

nd

ensate Trap

8

07

00

01

75

1

1

1

14

6

Ban

d R

C9

8H

Pi/e, C

on

d D

rain Tu

be, B

ott

om

KT

1

09

00

01

38

2

2

2

14

7

Co

nd

ensate D

rain tu

be

8

07

00

01

76

1

1

1

15

1

Electrod

e

10

50

00

23

3

1

1

1

15

2

Flame R

od

1

05

00

02

34

1

1

1

15

3

Electrod

e Packin

g 1

09

00

06

17

1

1

1

15

4

Electrod

e Plate

10

90

00

61

8

1

1

1

15

6

Electrod

e Slee

ve

10

90

00

62

0

1

1

1

20

0

Exhau

st Du

ct Assy

80

80

00

05

0

1

1

1

20

2

O-rin

g 1

08

00

00

18

2

2

2

20

3

Exhau

st Du

ct Packin

g 1

09

00

06

21

1

1

1

20

4

Therm

istor

10

50

00

23

5

1

1

1

20

5

O-rin

g 1

07

00

03

23

1

1

1

20

6

Exhau

st Du

ct Seal 8

08

00

00

51

1

1

1

20

7

Therm

istor Scre

w

10

90

00

62

2

1

1

1

20

8

Co

mb

usti

on

An

alysis Po

rt Cap

8

06

00

00

57

1

1

1

20

9

Ban

d

10

90

00

13

7

1

1

1

21

0

Flue C

on

necti

on

Asse

mb

ly 1

08

00

00

83

1

1

1

21

2

Exhau

st pip

e con

necti

on

po

rt - 2 in

ch

10

80

00

08

4

1

1

1

ITEM

DESCRIPTION

PART

NUMBER

i090C

i060C

i120C

H167-0775-1×01(00)