Thermo King CRR-40 119, Руководство пользователя

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Diagnosis
153
Condition Possible Cause Remedy
Evaporator fan motor(s)
does not operate Unit on defrost Check operating mode indicator LED’s
Unit in Economy Mode (Frozen Load;
Null mode ONLY) Check setpoint, indicator lights and
Setpoint menu of the controller to verify
that Economy Mode is set to ON
Loose line connection Tighten connections
Open motor internal thermal overload
protector Check for seized bearings or defective
thermal overload protector. Repair or
replace as necessary.
Defective motor Replace motor
Defective low or high speed
evaporator fan contactor Replace defective contactor
No low or high speed evaporator fan
output signal from controller Diagnose and replace evaporator fan
relay, main relay board or controller
Unit operating in a vacuum
(unit not cooling)
NOTE: When unit is in
Cool with Modulation or
the return air temperature
is below -18 C (0 F), the
suction pressure will be
less than 0 kPa, 0 bar, 0
psig during normal
operation
Shortage of refrigerant Repair leak and recharge
Compressor motor contacts frozen Clean points or replace contactor
Compressor inefficient Check valves and pistons
Defective liquid line solenoid valve Repair or replace liquid line solenoid
valve
Partial obstruction in low side or filter
drier Locate obstruction and repair
Iced or plugged evaporator coil Defrost or clean evaporator coil
Expansion valve partially closed by
ice, dirt or wax Clean or replace expansion valve
Expansion valve power element lost
its charge Replace expansion valve
Defective container insulation Correct or replace container insulation
Poor fitting container doors Repair or replace doors
Partial obstruction in high side Locate obstruction and repair
Suction pressure gauge out of
calibration Replace service gauge
Evaporator pressure regulator (KVQ)
valve stuck closed or defective Repair or replace valve
Expansion valve feeler bulb
improperly mounted, poorly insulated
or making poor contact Correct feeler bulb installation