T-349
6–2
6.3
UNIT RUNS BUT HAS INSUFFICIENT COOLING
Compressor Compressor valves defective
Refrigeration System
Abnormal pressures
Controller malfunction
Evaporator fan or motor defective
Suction modulation valve malfunction
Condenser Pressure Transducer defective
Check
Shortage of refrigerant
6.4
UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING
No operation of any kind
Start-Stop switch OFF or defective
Check
Circuit breaker OFF or defective
Check
External power source OFF
Turn ON
No control power
Circuit breaker or fuse defective
Replace
Control Transformer defective
Replace
Evaporator fan internal motor protector open
Heat relay defective
Check
Heater termination switch open
Unit will not heat or
has insufficient heat
Heater(s) defective
Heater contactor or coil defective
Replace
Evaporator fan motor(s) defective or rotating backwards
Evaporator fan motor contactor defective
Replace
Controller malfunction
Defective wiring
Replace
Loose terminal connections
Tighten
Low line voltage
6.5
UNIT WILL NOT TERMINATE HEATING
Unit fails to stop heating
Controller improperly set
Reset
Controller malfunction
Heater termination thermostat remains closed along with the
heat relay
6.6
UNIT WILL NOT DEFROST PROPERLY
Will not initiate
defrost automatically
Defrost timer malfunction (Cd27)
Loose terminal connections
Tighten/
Defective wiring
Replace
Defrost temperature sensor defective or heat termination
thermostat open
Replace
Heater contactor or coil defective
Replace
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
Содержание 69NT40-541-306
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Страница 78: ...T 354 5 8 Figure 5 3 Controller Operation Perishable Mode Figure 5 4 Controller Operation Frozen Mode ...
Страница 142: ...T 354 8 2 Figure 8 2 Schematic Diagram Standard Unit Configuration BASED ON 62 66686 00 ...
Страница 143: ...8 3 T 354 Figure 8 3 Unit Wiring Diagram Standard Unit Configuration 1 of 2 BASED ON 62 66686 00 ...
Страница 144: ...T 354 8 4 Figure 8 4 Unit Wiring Diagram Standard Unit Configuration 2 of 2 BASED ON 62 66686 00 ...
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