Thermo King 914 724, Руководство пользователя

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Electric Standby Mechanical Diagnosis
CONDITION POSSIBLE CAUSE REMEDY
Compressor does not run Improperly wired Check wiring against diagram
Low line voltage Check line voltage—determine
location of voltage drop
Relay contacts not closing Check and replace relay if defective
Power relay open Check relay, replace if defective
Motor wiring defective—open circuit Close power supply start or
disconnect switch
Tripped circuit breaker Reset
Open circuit in motor winding Check stator leads. If leads OK,
replace stator
High pressure cutout switch open Eliminate cause of excessive
pressure
Thermostat faulty Repair or replace
Compressor piston stuck Replace compressor
Frozen compressor or motor
bearings
Repair or replace
Shortage of refrigerant Recharge
Low pressure cutout switch open Recharge
Overload relay open Reset
Unit short cycles Evaporator fan rotating in wrong
direction
Correction rotation
Shortage of refrigerant (low pressure
cutout)
Repair leak and recharge
Restricted expansion valve (low
pressure cutout)
Replace expansion valve
Refrigerant overcharge (high
pressure cutout)
Remove excess charge
Cycling on high pressure cutout Check air flow and fan
Clogged condenser coil Clean coil