2._dc Motor Checking Procedure
Transcript of 2._dc Motor Checking Procedure
For MACO USE ONLY
DC motorDC motorshaft Rotor
magnetstator Stator
wiring
Fig. DC Fan motor construction
Motor PWBFig. Wiring of DC motor
Vm ; motor voltage input Vcc ; Control power voltage inputGND ; gndVs ; Speed control voltage input FG ; Revolution pulse output
Mold resin
Over heat protection starts at 125±15over.
2-12 V DC
For MACO USE ONLY
1. 1. Indoor DC Fan motor (type A) Indoor DC Fan motor (type A)
Fig. Wiring from PWB①Power voltage input (Vm /red)② NC③GND (Gnd /black)④Control signal (Vcc /white)⑤Speed control signal (Vsp /yellow)⑥Revolution output (Vfg /blue)
Measuring point Resistance when normal
- (Vcc - Gnd) 25 kΩ or higher - (Vsp - Gnd) 200 kΩ or higher - (Vm - Gnd) 25 MΩ or higher
4 3
1 3
5 3
Indoor DC Motor Part no.SSA512T072ASSA512T081SSA512T092 1
For MACO USE ONLY
22. Outdoor DC Fan motor (type D). Outdoor DC Fan motor (type D)
Fig. Wiring from PWB① Revolution output (Vfg /blue)② Speed control signal (Vsp /yellow) ③ Control signal (Vcc /white)④ GND (Gnd /black)⑤ NC ⑥ Power voltage input (Vm /red)
ZG model
Measuring point Resistance when normal
- (Vcc - Gnd) 25 kΩ or higher - (Vsp - Gnd) 200 kΩ or higher - (Vm - Gnd) 25 MΩ or higher
3 4
2 4
6 4
Outdoor DC Motor Part no.SSA512T075
SSA512T091ASSA512T094 1
For MACO USE ONLY
DMCT Checker procedure
1. Turn motor by hand, if hard reject (motor faulty) , if easy go to step 22. Check resistance each wire by digital meter ,compare with standard value3. Running check by DMCT, confirm V DC output from DMCT.
3. Check by DC motor checker2. Check resistance each wire by digital meter ,compare with standard value
1
For MACO USE ONLY
Analysis DC motor improvementBEFORE AFTER
Only check by digitalmeter, measuredresistance each wire,compare with standard
- Difficult to judgment-Up to many type of Digital meter.-Up to experience eachService man
1st
check resistance of each wire if pass go to check step 2
nd
2nd
check by dc motor checker.Running test condition.
-Easy and fast to judgment.-It can guarantee 100% to separate good dc motor before change.
1