![background image](http://html1.mh-extra.com/html/carrier/69nt40-489-100-series/69nt40-489-100-series_operation-and-service-manual_2563838077.webp)
53
T-305
SECTION 5
TROUBLESHOOTING
NOTE
This troubleshooting chart is to be used for refrigeration troubleshooting only,
for Controlled Atmosphere troubleshooting refer to Section 11, page 115.
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
4.2.2, page 45
Loss of control power
Circuit breaker OFF or defective
Check
Control transformer defective
Replace
Fuse (F3) blown
Check
Start-Stop switch OFF or defective
Check
Component(s) Not Operating
Evaporator fan motor internal protector open
6.16, page 70
Condenser fan motor internal protector open
6.11, page 66
Compressor internal protector open
6.8, page 61
High pressure switch open
5.7, page 55
Heat termination thermostat open
Replace
Compressor hums, but does not
start
Low line voltage
Check
Single phasing
Check
Shorted or grounded motor windings
6.8, page 61
Compressor seized
6.8, page 61
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
Unit in Emergency Bypass mode.
4.11.1, page 52
Shortage of refrigerant
6.7.1, page 60
Evaporator coil covered with ice
5.6, page 54
Evaporator coil plugged with debris
6.15, page 70
Evaporator fan(s) rotating backwards
6.15, page 70
6.16, page 70
Defective evaporator fan motor/capacitor
6.17, page 71
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
6.10, page 66
Compressor worn
6.8, page 61
Current limit (function code Cd32) set to wrong value
3.3.5, page 20
Suction modulation valve malfunction
6.18, page 71
Содержание 69NT40-489-100 Series
Страница 2: ......
Страница 4: ......
Страница 14: ...Safety 10 T 305...
Страница 28: ...4 T 305...
Страница 40: ...16 T 305...
Страница 50: ...26 T 305 Figure 12 Standard Configuration Report...
Страница 112: ...88 T 305...
Страница 163: ...139 T 305 CFS KA6 CFA1 QC1 FDH HST RRS SINGLE SENSOR ONLY Figure 88 Wiring Diagram Sheet 2 of 2...
Страница 164: ...140 T 305...
Страница 167: ...143 T 305 Based on drawings 62 10526 Rev and 62 10736 Rev Figure 90 Electrical Schematic CA...
Страница 168: ...144 T 305 ALTERNATE CONFIGURATION Figure 91 Electrical Wiring Diagram Controlled Atmosphere Sheet 1 of 2...
Страница 169: ...145 T 305 F Figure 88 E Figure 88 Figure 91 Electrical Wiring Diagram Controlled Atmosphere Sheet 2 of 2...
Страница 172: ...148 T 305 Figure 93 Electrical Wiring Diagram Sheet 1 of 2 Units not modified to include the N2 Purity Solenoid Valve...
Страница 174: ...150 T 305...