SAWAFUJI ELECTRIC 0642 032 0R12, Service Manual

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■ Typical Problem
※１ Ambient temp 25℃
※２ Ambient temp 25℃ to -16℃
Symptoms Cause Test Result Treatment
Resistance of compressor coil is ∞Ω
・Normal: Approx. 1.69Ω(K3) ※１
Output voltage of power supply is AC 0V
・Normal: Approx. AC13 - 17V ※１
Resistance of thermister
・Normal: Approx. 2kΩ- 10kΩ ※２
Replace of cooling unit
Replace fan motor
Charge the bettery
Make some room for cool air
Replace the fuse
Replace the fuse
Check the vehicle
■ Technical Data
※１ Ambient temp 25℃
※２ Ambient temp 25 to -16℃
Checking Points Normal data
Wire thermisiter is open Replace thermister
* Ambient temparature is higher than 30℃
* Ventilation at mechanical part is not enough
5. TROUBLE SHOOTING
Lamp of control
assy is lit.
Inside of the fridge does not
get cold
Coil of the compressor is open Replace the cooling unit
Power supply is broken Replace power supply
Compressor does not work
Make at least 150mm room
between unit and wall
* Too many things are put inside
Lamp of control assy is not lit.
* The special fuse inside DC cord is open
* Fuse in the vehicle is open
* Socket or other DC power line in the vehicle is bad
Cooling is weak
* Gas is leaking from Cooling Unit
Resistance of the compressor
Between incoming cords to compressor
(by detaching from terminal of compressor)
Approx. 1.69Ω(K3) ※1
* Fan motor is broken
* Input voltage is lower than 10V
Checking items
Input voltage at compressor Between terminals of compressor Approx. AC 13V - 17V ※１
Resistance of thermistor Between two pin of the coupler Approx. 2KΩ - 10KΩ ※２
9
Output voltage of power supply
Between outgoing cords from power supply
(by ditaching from terminal of compressor)
Approx. AC 13V - 17V ※１
Special fuse Special fuse of DC cord 0Ω