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5
−
1
T-318
SECTION 5
TROUBLESHOOTING
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.1 UNIT WILL NOT START OR STARTS THEN STOPS
No power to unit
External power source OFF
Turn on
Start-Stop switch OFF or defective
Check
Circuit breaker tripped or OFF
Check
Autotransformer not connected
Loss of control power
Circuit breaker OFF or defective
Check
Control transformer defective
Replace
Fuses (F3A , F3B) blown
Check
Start-Stop switch OFF or defective
Check
Component(s) Not Operating
Evaporator fan motor internal protector open
Condenser fan motor internal protector open
Compressor internal protector open
High pressure switch open
Heat termination thermostat open
Replace
Compressor hums,
but does not start
Low line voltage
Check
Single phasing
Check
Shorted or grounded motor windings
Compressor seized
5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING
Container
Hot load (Failure to Pre
−
cool)
Normal
Defective box insulation or air leak
Repair
Refrigeration System
Shortage of refrigerant
Evaporator coil covered with ice
Evaporator coil plugged with debris
Evaporator fan(s) rotating backwards
Defective evaporator fan motor/capacitor
Air bypass around evaporator coil
Check
Controller set too low
Reset
Compressor service valves or liquid line shutoff valve par-
tially closed
Open valves
completely
Dirty condenser
Compressor worn
Current limit (function code Cd32) set to wrong value
Suction modulation valve malfunction
Содержание 69NT40-541-300
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Страница 131: ...7 3 T 318 Based on Drawing 62 66058 Figure 7 2 SCHEMATIC DIAGRAM Units with 3 Phase Evaporator Motors...
Страница 133: ...7 5 T 318 6 Heater FCCH FCCH Figure 7 4 SCHEMATIC DIAGRAM Units with Normal Evaporator Fan Capability...
Страница 134: ...7 6 T 318 FCCH FCCH Figure 7 5 SCHEMATIC DIAGRAM Units with Single Evaporator Fan Capability...
Страница 136: ...7 8 T 318 To ST10 To TRX2 To QC1 To QC1 To QC1 To MC6 CONTROLLER Figure 7 7 SCHEMATIC DIAGRAM Emergency Bypass...
Страница 138: ...7 10 T 318 Based on Drawing 62 66058 Figure 7 9 UNIT WIRING DIAGRAM Units with 3 Phase Evaporator Motors Sheet 1 of 2...
Страница 139: ...7 11 T 318 Based on Drawing 62 66058 Figure 7 10 UNIT WIRING DIAGRAM Units with 3 Phase Evaporator Motors Sheet 2 of 2...
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