Alfa Laval Marine & Power
FOPX Separation System
Alarms and Fault Finding
Product No.
PrintedBook No.
1762661-451762764-061762765-061762766-05
1763054-051763056-061763057-061763058-05
Jan 19951810034-02 V1
Alfa Laval reserve the right to make changes at any time without prior notice.
Any comments regarding possible errors and omissions or suggestions for improvement of this publication would be gratefully appreciated.
Copies of this publication can be ordered from your local Alfa Laval company.
Published by: Alfa Laval Separation ABMarine & Power Oil Treatment DivisionS - 147 80 TumbaSweden
© Copyright Alfa Laval Separation AB 1995. Printed in Sweden.
Contents
1 Scope 1
2 EPC Signs 3
3 Alarms 5
3.1 Alarm Fun ctions 5
3.2 Alarm Reset 6
3.3 Alarm Survey 7
3.4 LED Alarms and Fault Finding 8
3.4.1 High Oil Pressure 8
3.4.2 Low Oil Pressure (Low Flow) 9
3.4.3 Sludge Discharge Failure 10
3.4.4 Water Transducer Fault 11
3.4.5 Emergency Stop 12
3.4.6 Vibrations (Option) 13
3.4.7 Heater Fault 14
3.5 LED and Display Alarms and Fault Finding 15
3.5.1 High or Low Oil Tempera-ture (Option) 15
3.5.2 Temperature Sensor Error (Option) 16
3.6 Display Alarms and Fault Finding 17
3.6.1 Communication Error 17
3.6.2 Processor Fault 18
3.6.3 Programming Error 19
3.6.4 Power Failure 20
3.6.5 Temperature Deviation 21
3.6.6 ALCAP Alarms 22
3.6.7 Other Alarms 23
4 Alarm Tests 25
5 Test Program 27
5.1 How to Start the Test Program 27
5.2 Lamp Test 28
5.3 How to Activate Different Parts of the Test Program 28
5.4 Functions in the Test Program 29
1 Scope
The alarms, alarm tests and the test program are valid for the following separation systems:
FOPX 605
FOPX 609
FOPX 610
FOPX 613
1
1 Scope FOPX Alarms and Fault Finding
2
2 EPC Signs
r.
P00
0881
A
functions
P0
0089
1A
ions (Options)
The signs to the control unit for the FOPX separation systems are shown in this chapte
Monitoring
Monitoring funct
3
2 EPC Signs FOPX Alarms and Fault Finding
P00
0991
A
ignals
P0
006
41A
symbols
Output s
Operating
4
3 Alarms
t afe
G0
4420
11
ther by an alarm LED (to the left in the ether with the main alarm LED (to the
3.1 Alarm Functions
The alarm system is designed to ensure thathe separation system always remains in a sstate. There are two different types of alarmfunctions:
• Sensor-related alarm functions are indicated by light emitting diodes (LEDs)on the EPC-400.
• Display-related alarm functions are indicated on the EPC-400 display. Whenany of the displayed alarm functions are activated the left digits start flashing andthe right digits are steadily lit.
If there is more than one alarm at the same time, the EPC-400 will display the alarm withthe highest priority first and then the next alarm, and so on in priority order.
An activated alarm condition is identified eipicture) or an alarm code on the display togright in the picture).
5
3 Alarms FOPX Alarms and Fault Finding
g
.
ill
G00
1645
AG
001
647A
3.2 Alarm Reset1. Acknowledge the alarm signal by pressin
the alarm push-button.The flashing light then changes to steady
2. Remedy the cause.
3. Reset the alarm function by pressing thealarm push-button a second time.The LED will turn off.
It is possible to reset the system without remedying the cause, but the alarm signal wbe repeated.
NOTE
Never return to the EPC-400 control unit to acknowledge or reset an alarm if it by any means can be hazardous.
6
FOPX Alarms and Fault Finding 3 Alarms
Page
8
ow)" 9
" 10
11
12
13
14
ture” 15
r”16
17
18
19
20
21
22
23
3.3 Alarm SurveyLED alarms
Display alarms
Alarm function
"High Oil Pressure"
"Low Oil Pressure (Low Fl
"Sludge Discharge Failure
"Water Transducer Fault"
"Emergency Stop"
“Vibrations” (Option)
"Heater Fault"
“High or Low Oil Tempera(Option)
“Temperature Sensor Erro(Option)
"Communication Error"
"Processor Fault"
"Programming Error"
"Power Failure"
"Temperature Deviation"
"ALCAP Alarms"
“Other Alarms”
7
3 Alarms FOPX Alarms and Fault Finding
orrective action
pen or regulate RV4, or other valves, to correct back ressure, normally about 1.5 bar (150 kPa).
omatic actions after alarm reset
ain alarm off.
larm diode off.
1 is set for oil feed to separator.
3.4 LED Alarms and Fault Finding
3.4.1 High Oil Pressure
Cause C
Regulating valve, RV4, or other valves, downstream throttled or closed.
Op
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode (PS41) flashes. A
Change over valve (V1) is set for oil recirculation. V
S0
0180
1A
8
FOPX Alarms and Fault Finding 3 Alarms
orrective actions
heck the oil feed pump.djust the oil flow.
lean the strainer.
heck the oil feed pump.
. Check the air supply to the solenoid valve block air (MV1).
. Check MV1.
. Check V1.
crease the back pressure with regulating valve V4. The correct back pressure is normally about 1.5 ar (150 kPa).
heck the opening water valve (MV15) for leakage.ee “Separator Manual”.
ee “Separator Manual”.
omatic actions after alarm reset
ain alarm off.
larm diode off.
1 is set for oil feed to separator.
3.4.2 Low Oil Pressure (Low Flow)
Causes C
Too low oil feed. CA
Strainer before the oil feed pump is clogged. C
Oil feed pump has stopped. C
Change over valve (V1) is in recirculation position. 1
2
3
Too low back pressure. InRb
Bowl opened accidentally during operation. CS
Leakage from bowl. S
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode (PS42) flashes. A
V1 is set for oil recirculation. V
S00
1802
A
9
3 Alarms FOPX Alarms and Fault Finding
orrective actions
heck the water supply system.
heck MV15.
heck PS42.
. Check the separator by manually open MV15.
. Dismantle and check the operating water system. See “Separator Manual”.
harge, within the same discharge cycle, have failed.
omatic actions after alarm reset
ain alarm off.
larm diode off.
. If the power has been off during more than approximately 10 minutes the separator bowl must be stopped and manually cleaned before restart.
. The separator and the EPC program has to be restarted.
3.4.3 Sludge Discharge Failure
Causes C
No or very low opening water supply. C
Opening water valve (MV15) broken. C
No signal from low oil pressure switch (PS42) at dis-charge.
C
Separator operating water system not working. 1
2
N.B. This alarm is activated after two attempts to disc
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode flashes. A
The stop sequence is initiated. 1
2
I00
0682
A
10
FOPX Alarms and Fault Finding 3 Alarms
orrective actions
heck connections.
heck supply voltage in the MT4 on terminal 3 - 4 (20 DC). bout every 5:th second the voltage at terminal 4 - 5 0 VDC) will drop for approx. 0.5 second:
If voltage drop: replace the oscillator unit.
If no voltage drop: replace the EPC control module.
or more information about the interconnections, see ystem Reference”.
omatic actions after alarm reset
ain alarm off.
larm diode off.
1 is set for oil feed to separator.
3.4.4 Water Transducer Fault
Causes C
Loose connection between transducer test circuit board and oscillator.
C
Faulty oscillator unit or faulty EPC control module. CVA(2
•
•
F“S
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode flashes. A
Change over valve (V1) is set for oil recirculation. V
S00
0261
A
11
3 Alarms FOPX Alarms and Fault Finding
orrective actions
. Remedy the cause why the emergency stop button was pushed and then reset it.
omatic action after alarm reset
he alarm function can not be reset by pushing the larm reset button.
. Reset the alarm by switching the power off and on.
. Restart the separator.
. Restart the EPC program.
3.4.5 Emergency Stop
Cause C
Emergency stop button has been pushed. 1
Automatic actions at alarm Aut
Main alarm flashes.Alarm diode flashes.The separator is stopped and the heater is off.Oil feed is on for further 3 minutes through the heater and separator.Bowl closing water supplied for 3 minutes.
Ta
1
2
3
NOTE
The separator bowl must be manually cleaned before starting up again.
S00
3911
A
12
FOPX Alarms and Fault Finding 3 Alarms
orrective actions
emedy the cause. See “Separator Manual”.heck the vibration switch setting.
omatic action after alarm reset
he alarm function can not be reset by pushing the larm reset button.
. Reset the alarm by switching the power off and on.
. Restart the separator.
. Restart the EPC program.
3.4.6 Vibrations (Option)
Cause C
Vibration switch activated.Separator bowl out of balance.
RC
Automatic actions at alarm Aut
Main alarm flashes.Alarm diode flashes.Separator is stopped.Oil feed is on for a further 3 minutes through the heat-er and separator.Bowl closing water supplied for 3 minutes.
Ta
1
2
3
NOTE
The separator bowl must be manually cleaned before starting up again.
S00
0111
A
13
3 Alarms FOPX Alarms and Fault Finding
trolled by the EPC-400.
orrective action
oil flow stopped, investigate the cause. See correc-ve actions for PS42.heck the flow switch on the Heatpac heater. temperature switch tripped, investigate the temper-ture switch setting. If OK check the heater for clean-ness.
lean heater.
omatic actions after alarm reset
ain alarm off.
larm diode off.
1 is set for oil feed to separator.
eater switched on.
3.4.7 Heater Fault
N.B. Heater fault is only activated if the heater is con
Cause C
Oil flow stopped or temperature switch tripped in an installed Heatpac heater.
IftiCIfali
Clogged heater. C
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode flashes. A
Change over valve (V1) is set for oil recirculation. V
Heater switched off. H
I00
0221
A
14
FOPX Alarms and Fault Finding 3 Alarms
ted.
orrective actions
vestigate the reason and remedy it.
vestigate the reason and remedy it.
. Adjust the parameters.P5 = max. tempP6 = min. tempP7 = set point.See “Parameter List”.
. Check the temperature control loop.
. Check and adjust the SRV1 function.
. Check the EPC output functions.
heck the heater and parameter P41, See “Parame-r List”.
heck the Pt 100 temperature sensor.
larm is acknowledged. To find the appropriate et button twice 1C (1F) = TT1, 2C (2F) = TT2. For
omatic actions after alarm reset
ain alarm off.
larm diode off and display returned to normal.
1 is set for oil feed to separator.
eater is switched on (if heater is controlled by EPC-00).
3.5 LED and Display Alarms and Fault Finding
3.5.1 High or Low Oil Temperature (Option)
N.B. Also applicable to TT2 temperature sensor, if fit
Causes C
Low temperature alarm when:- clogged heater- insufficient steam supply- faulty steam trap- faulty steam supply valve- electric fault (tripped fuse)
In
High temperature alarm when:- faulty steam supply valve- electrical control system out of function
In
Set point (P7) changed or the alarm limits are too close to the set point.
1
2
Steam control valve (SRV1) too far open or closed. 1
2
Low temperature alarm when the temperature in-creases too slowly, during the start.
Cte
Pt 100 temperature signal faulty. C
N.B. The current temperature is indicated when the atemperature sensor reading, push the alarm resmore information, see “Operating Instructions”.
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode and displayed value flashes. A
Change over valve (V1) is set for oil recirculation. V
Heater is switched off at high temperature (if heater is controlled by EPC-400).
H4
S0
001
21A
S00
014
1A
15
3 Alarms FOPX Alarms and Fault Finding
ted.
orrective actions
heck the temperature sensor by the test program, ee ‘‘Analog inputs’’ on page 32 in the chapter "Test rogram".
heck the connections.
heck the cables between the temperature sensor nd EPC-400.
process value reading.re sensors are fitted, alarm A6 is also activated.
omatic actions after alarm reset
ain alarm off.
larm diode off and display returned to normal.
1 is set for oil feed to separator.
3.5.2 Temperature Sensor Error (Option)
N.B. Also applicable to TT2 temperature sensor, if fit
Causes C
Temperature sensor is incorrectly connected. CsP
Temperature sensor loop is open or short-circuit. C
Temperature sensor cables are too close to power ca-bles.
Ca
N.B. Push the alarm reset button to find appropriate 1C (1F) = TT1, 2C (2F) = TT2. If both temperatu
Automatic actions at alarm Aut
Main alarm flashes. M
Alarm diode and displayed value flashes. A
Change over valve (V1) is set for oil recirculation. V
S00
012
1A
S00
013
1A
16
FOPX Alarms and Fault Finding 3 Alarms
Corrective actions
ror between front rd.
1. Check by measurement the fuses A1:F2 (front board), A2:F2 and A2:F3 (rear board).(See “Component Description, EPC-400 Control Unit”).
2. Replace the control module.
t alarm Automatic actions after alarmreset
. Main alarm off.Display normal.
3.6 Display Alarms and Fault Finding
3.6.1 Communication Error
Alarm code Cause
Communication erand rear circuit boa
Automatic action a
Main alarm flashesDisplay flashes.
S0
0015
1AI0
011
05A
17
3 Alarms FOPX Alarms and Fault Finding
Corrective actions
. Replace control module.
r. Replace control module.
Replace control module.
Replace control module.
Check that the mode selector is in the correct position.
ital) conversion Check the fuse A1:F2 (front board)If the fuse is correct, replace the control module.
Ask for service or replace the con-trol module.
at alarm Automatic actions after alarmreset
. Main alarm off.Display normal.
3.6.2 Processor Fault
Alarm codes Causes
Internal RAM error
External RAM erro
E2 RAM error.
Program error.
Mode switch error.
A / D (Analog / Digerror.
Calibration error.
Automatic actions
Main alarm flashesDisplay flashes.
S00
0161
AI0
010
91A
I00
110
6A
I001
092
AI0
010
93A
I001
096A
I001
094
AI0
0109
5A
18
FOPX Alarms and Fault Finding 3 Alarms
Corrective action
e too long utes without g this time).
Change the mode selector to the “L” (Local) position and when appropriate, return to the “P” (Programming) position and continue with programming.
at alarm Automatic actions after alarm reset
. Main alarm off.Display normal.
3.6.3 Programming Error
Alarm code Cause
Programming mod(more than 30 minprogramming durin
Automatic actions
Main alarm flashesDisplay flashes.
S00
0171
AI0
011
08A
19
3 Alarms FOPX Alarms and Fault Finding
tinuous during the alarm delay time before an alarm is
Corrective actions
1. Check the power supply.
2. If the power has been off during more than approximately 10 minutes the separator bowl must be stopped and manually cleaned before restart.
3. Restart the heater, separator and EPC program.
ency too high 1. Check the power supply.
2. If the power has been off during more than approximately 10 minutes the separator bowl must be stopped and manually cleaned before restart.
3. Restart the heater, separator and EPC program.
at alarm Automatic actions after alarmreset
A4-1:nd display start r returns.
Only valid for alarm A4-1:Main alarm off.Display indicates “OFF”.
A4-2:.
Only valid for alarm A4-2:Main alarm off.Display normal.
3.6.4 Power Failure
1. The frequency deviation must be repeated or be conactivated.
Alarm codes Causes
Power failure.
Power supply frequ
(more than + 5%).1
Automatic actions
All outputs are off.
Only valid for alarmMain alarm diode ato flash when powe
Only valid for alarmMain alarm flashesDisplay flashes.
S00
0181
AI0
011
03A
I00
110
4A
20
FOPX Alarms and Fault Finding 3 Alarms
Corrective actions
tion alarm n TT1 and TT2/54 °F).
At commissioningCheck if the distance between sen-sors is too great.System in operationCheck the temperature sensors.
at alarm Automatic actions after alarmreset
. Main alarm off.Display normal.
ate process value reading 1C (1F) = TT1, rating Instructions”.
3.6.5 Temperature Deviation
Alarm code Cause
Temperature devia(difference betweeis more than 30 °C
Automatic actions
Main alarm flashesDisplay flashes.
N.B. Push the alarm reset button to find the appropri2C (2F) = TT2. For more information, see “Ope
S00
0191
AI0
011
09A
21
3 Alarms FOPX Alarms and Fault Finding
Corrective actions
cer (MT4)
ntent in oil. Check the oil system for water leak-age.
cer dirty inside. Clean the liquid-wetted surfaces of water transducer. See “Component Description, Water Transducer”.
cer (MT4)
the MT4. 1. Check connections in control unit and transducer.
2. Check cables for damage.
n between and electrode.
1. Check the cable connection.
2. Tighten oscillator unit to the electrode.
ore than 24 The reason for stand-by mode must be checked!Try then to operate the system nor-mally.
fault. Replace control module.
ter transducer e discharges in a
1. Check the displacement water supply, including parts in separator.
2. Check for bowl leakage.
at alarm Automatic actions after alarm reset
. Main alarm off.Display normal.
3.6.6 ALCAP Alarms
Alarm codes Causes
High water transduvalue (above 400):
• High water co
• Water transdu
Low water transduvalue (below 100):
• Open circuit in
• Bad connectiooscillator unit
ALCAP stand-by mhours.
PROM and/or RAM
No triggering by wasignal at two sludgrow.
Automatic actions
Main alarm flashesDisplay flashes.
S00
0211
A
I00
1111
AI0
0111
2A
I001
113
AI0
011
15A
I001
181
A
22
FOPX Alarms and Fault Finding 3 Alarms
Corrective actions
1. Check the connected external function.
2. Check the jumper at terminal XC-X7:1 (when extra alarm not used).
l (PS42) faulty at be open.
Check the pressure switch.
at alarm Automatic actions after alarm re-set
. Main alarm off.Display normal.
er sequences is lid for alarm
3.6.7 Other Alarms
Alarm codes Causes
Extra alarm.
Low pressure signastart. Circuit should
Automatic actions
Main alarm flashesDisplay flashes.
The start of the timblocked (is only vaA9-2).
S00
0201
A
I00
112
1AI0
011
22A
23
3 Alarms FOPX Alarms and Fault Finding
24
4 Alarm Tests
o
Sensor Actions to provoke an alarm
PS41 Increase back pressure.
PS42 A. Stop oil feed pump.
B. Change V1 position by reducing air pressure.
C. Reduce the back pressure.
re PS42 1. Disconnect hose for opening water (MV15).
2. Initiate a sludge discharge.
MT4 Disconnect cable to XE:4 (the test signal to MT4).
XS2 Press the emergency stop button.
XS1 Tap on the vibration switch three times within one second.
- 1. Start the heater.
2. Disconnect cable to X9:3.
Use the following guide for testing alarm functions by activating them. Alarms are provoked by one or more actions (A, B and son) as shown in the right column, however, certain alarm functions can not be tested without being disconnected.
N.B. If the alarm functions are to be disconnected in the control unit, be careful to avoid a short-circuit.
The recommendation is to test the alarms every 3 months.
LED alarm Display alarm Function
High oil pressure
Low oil pressure (low flow)
Sludge discharge failu
Water transducer fault
Emergency stop
Vibrations (option)
Heater fault
25
4 Alarm Tests FOPX Alarms and Fault Finding
- TT1 A. Remove sensor from pipe and put into hot/cool liquid.
B. Change alarm limit parameters (P5 = max temp., P6 = min. temp.) in relation to actual temperature. For more information see “Parameter List”.
N.B. Reset the parameter values after test.
- Remove fuse A2:F3 (rear board).
- Remove fuse A1:F2 (front board).
- Leave the mode selector switch in position P for 30 minutes.
- Switch the power to the EPC off and on when it is in operation.
TT1 - TT2 Remove one sensor from pipe to cool off or be heated up (temp. diff. more than 30 °C/54 °F).
MT4 Touch the central screw in the MT4 connection box.
MT4 Disconnect cable to XE:3 in EPC.
MT4 A. Change parameter 70 to a low value (e.g. 5 seconds) and initiate discharge cycle twice.
B. Close displacement water supply and wait 2 discharge cycles.
The amount of displacement water
supply is checked every 2nd dis-charge.
- A. Activate appropriate sensor.
B. Disconnect cable X7:1.
)PS42 With the EPC in off mode put a jump-
er between XC- X7:4 and push the start button.
Sensor Actions to provoke an alarm
High or low oil temperature (option)
Communication error
A / D conversion error
Programming error
Power failure
Temperature deviation
High water transducer (MT4) value (above 400).
Low water transducer (MT4) value (below 100).
Insufficient amount of displacement water
Extra alarm
PS42 faulty at start(Circuit should be open
LED alarm Display alarm Function
26
5 Test Program
,
the
d.
P0
001
91A
The EPC-400 control unit has a test programfor testing of input and output functions, memory etc.
This test program should be run when the installation is made and whenever there is aneed for it, for instance, during fault finding.
5.1 How to Start the Test Program
N.B. The test program is only to be used when the separation system is out of operation.
To run the test program, do as follows:
1. Open the control unit door.
2. Switch the power off and the mode selector in any position (R, L or P).
3. Press simultaneously the discharge and alarm push-buttons, and keep them pressed.
4. Switch the power on.
5. Release the discharge and alarm push-buttons when the test program has starte
27
5 Test Program FOPX Alarms and Fault Finding
ts 3
FOPX
V5
MV10V1
MV16
MV15
EPC-400
TT2
TT1
XS1
MT4 FS4
FOPX
XT1
G00
114
2AP
00
0181
A
5.2 Lamp Test
The test program starts with a lamp test.
1. The display lit with power on.
2. There are two ways to check the lamps:
• Each LED and display segment individually lit (see the picture).
• Each group of LED:s and display segments lit.
Push the button 2 (see the figures in the picture below) to switch between the twomodes.
5.3 How to Activate Different Parts of the Test Program
Use the push-buttons to activate different parof the test program (see the figures 1, 2 andin the picture).
1. Push button 1 to step from function 1 to function 2 etc. in the test program. It is not possible to step backwards.Wait until the function is activated beforepushing the button again.
2. Push button 2 to step forward within each function in the test program, for instancefrom function 1.1 to 1.2.
3. Push button 3 to activate or deactivate output terminal (function 5 and 6).
28
FOPX Alarms and Fault Finding 5 Test Program
Terminal Unit Correct value
X7:4-XC PS42 0
X7:3-XC PS41 1
ibration X8:4-XC XS2 or XS1
1
- -
X8:2-XC Remote switch
0
X8:1-XC Remote switch
0
5.4 Functions in the Test Program
1. Memory
2. Digital inputs
Function
1.1 PROM
1.2 Internal RAM
1.3 External RAM
1.4 EEPROM
Function
2.1 Low flow
2.2 High pressure
2.3 Not in use
2.4 Not in use
2.5 Emergency stop or Vswitch
2.6 Not in use
2.7 Start or stop EPC
2.8 Start or stop heater
I000
941A
Memory correct
I00
095
1A
Memory fault
I000
941
A
Circuit open
I000
961A
Circuit closed
29
5 Test Program FOPX Alarms and Fault Finding
Terminal Unit Correct value
r Reset X9:4-XC Remote switch
0
X9:3-XC 1
X9:2-XC Remote switch
0
3. Digital inputs
4. Mode selector
Function
3.1 Alarm acknowledge o
3.2 Heater fault
3.3 Sludge discharge
Function
4.1 Remote (R) position
4.2 Local (L) position
4.3 Program (P) position
I00
0941
A
Circuit open
I000
961
A
Circuit closed
I000
971
A
Remote position
I000
981A
Local position
I00
0991
A
Program position
30
FOPX Alarms and Fault Finding 5 Test Program
Terminal Unit
X4:4-XD MV1/V1
X5:1-XD MV5
ing water X5:2-XD MV10
X5:3-XD MV15
X5:4-XD MV16
or Heatpac X6:1-XD -
e or Heatpac X6:2-XD -
or Heatpac X6:3-XD
Terminal Unit
X6:4-XD
ng during X4:2-XD K15 in power unit
X1:1-2
rm X2:1-2
itch X2:3-4 XS1
5. Digital outputs
Use push-button 3 to activate or deactivate each output (see ‘‘How to Activate Different Parts of the Test Program’’ on page 28).
N.B. Corresponding green LED is not lit.
6. Digital outputs
Use button 3 to activate or deactivate each output. (See ‘‘How to Activate Different Partsof the Test Program’’ on page 28.)
N.B. Corresponding green LED is not lit.
7. Not in use
Function
5.1 Oil feed
5.2 Water drain
5.3 Displacement or sealsupply
5.4 Opening water
5.5 Closing water
5.6 Steam shut-off valve fixed load
5.7 Steam valve decreasfixed load
5.8 Steam valve increasefixed load
Function
6.1 Heatpac variable load
6.2 Heatpac alarm blockistart
6.3 Not in use
6.4 Separator stop
6.5 Not in use
6.6 Remote/common ala
6.7 Blocking vibration sw
I000
941A
Circuit deactive
I00
0961
A
Circuit active
I000
941
A
Circuit deactive
I00
096
1A
Circuit active
31
5 Test Program FOPX Alarms and Fault Finding
s d.
or
Causes to the alarm “Temperature sensor error” (the display shows the alarm code “EEE”)
se A1:F2 blown
A/D conver-sion faulty
Input open Input short circuit
000 000 255 000
000 000 255 000
000 000 195 – 215 195 – 215
P0
001
11A
8. Analog inputs
To simulate the temperature sensor element(Pt 100) in 8.1 and 8.2, a resistor can be useSeparate plug connectors with appropriate resistors are included in the test module kit.
The normal value on the display for function8.1 and 8.2 should be 60 – 215. Outside therange 42 – 233 indicates a fault. Value 000 (a very low value) or 255 indicates a serious fault.
A normal value for function 8.3, Reference 4 V should be 195 – 215.
The table below shows how to find the fault.
For instance, if the display shows “000” for function 8.1, 8.2 and 8.3, it must be either a blown fuse or A/D converter fault. Check it inthis order:
1. If the fuse is blown, replace it.
2. If the fuse is correct, replace the control module.
Resistor Ref.temp Display reading
110 Ω 25 °C/77 °F 60140 Ω 104 °C/219 °F 215
Function Terminal Unit Fu
8.1 Temperature sensor for control
X10:1-2-3 TT2
8.2 Temperature sensor for alarm
X11:1-2-3 TT1
8.3 Reference 4 V
8.4 Not in use
32
FOPX Alarms and Fault Finding 5 Test Program
Terminal Unit
an E).X14:1-3
DC rrect).
X14:1-3
P00
012
1A
9. Serial communication
N.B. Disconnect the communication cable and put a jumper between X14:3-4 before the test is carried out.
N.B. After the test, remove the terminal jumpers and connect communication cables.
Function
9.1 Not applicable(The display will show
9.2 RS 232 CMeasure -10 to -12V on X14:1-3 (Circuit co
I000
941A
Circuit correctI0
0095
1A
Circuit fault
33
5 Test Program FOPX Alarms and Fault Finding
n
I00
0941
A
Circuit correct
I00
095
1A
Circuit fault
10.Test of EPROM (rear circuit board)
11. Test of internal RAM in CPU (rear circuit board
12.Test of external RAM in CPU (rear circuit board)
13.Test of IC 8255 I/O port (rear circuit board)
14.Low reference analog input (internal)
A value between 42 and 66 is displayed, wheit is correct.
15.High reference analog input (internal)
A value between 220 and 310 is displayed, when it is correct.
16.Transducer signal (internal)
The display shows 100 ± ∼50 with oil in WT 200 and 55 ± 10 with air, when it is correct.
17.Not in use
18.Not in use
34