TROUBLE DIAGNOSIS
-70-
Problems Causes Checks Measures Remarks
High Cycle pipe is clogged. Check sequence. - Maybe evacuate should be the first Direr must be replaced.
temperature in 1. Check temperature of condenser step here. If the servicer puts a torch
the freezer manually. to a charged system, the joint will
compartment. If it is warm, OK. explode and spray refrigerant on him.
If it is not, compressor discharging Also, if oil is forced out, it could
joints might be clogged. create a fire or safety hazard.
2. Manually check whether hot line - If it's warm, OK. If it's not,
pipe is warm. condenser discharging line weld
If it is warm, OK. joints might be clogged.
If it is not, condenser outlet weld Discharge the system and recover the
joints might be colgged. refrigerant. Then use a torch to
disconnect unbraze the piping to repair
the obstruction. Repair, evacuate the
system, and recharge it before testing.
Leak at loop pipe weld joint Check sequence. Replace the compressor, weld, Drier must be replaced.
(discharge) in compressor. 1. Manually check whether evacuate, and recharge refrigerant.
condenser is warm, It is not warm
and the frost forms partly on the
evaporator in the freezer
compartment.
Faulty cooling fan in the compressor Check sequence. - Replace if motor does not operate.
compartment. 1. Check cooling fan operation. - If fan is disconnected, check fan
2. Check that cooling fan is damage and reassemble it.
disconnected from the motor. ■ Refer to fan motor disassembly
and assembly sequence.
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