Thermo King CRR-20, Руководство по обслуживанию

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CRR-20 & CRR-40, September 1999
Diagnosis Mechanical Diagnosis 8-3
Condition Possible Cause Remedy
Noisy unit Insufficient compressor oil Add oil to proper level
Loose mounting bolts Tighten mounting bolts
Oil slugging or refrigerant flooding Add oil or refrigerant charge. Check
back expansion valve adjustment
Worn fan motor bearings Replace bearings or motor
Faulty compressor Repair or replace compressor
Condenser fan motor does Unit in Null, Heat or Defrost Check indicator lights. If unit is in
not operate Null, Heat or Defrost, unit operation is
normal (no remedy required)
Unit on water-cooled condensing If condenser-receiver tank has water
operation (Option) pressure, unit operation is normal
Unit in Cool or Modulation Check indicator lights and discharge pres-
sure. If condenser head pressure is below
1100 +/- 50 kPa, 11.0 +/- 0.5 bar, 160 +/- 7
psig, unit operation is normal (no remedy
required)
Defective condenser fan pressure Replace defective switch
switch or water pressure switch
(option)
Loose line connection Tighten connections
Open motor internal thermal Check for seized bearings or defective
overload protector thermal overload protector. Repair or
replace as necessary
Defective motor Replace motor
Defective high speed condenser fan Replace defective contactor
contactor
No high speed condenser fan output Diagnose and replace output module or
signal from controller controller. Disconnect water supply to unit
(option) and check water pressure switch
(option) before replacing controller