Carrier Transicold 68RF50 Neoplan-LA - Section 3 Troubleshooting; 3.1 Unit Will Not Cool; 3.2 Insufficient Cooling; 3.3 Abnormal Pressure Issues

SECTION 3
TROUBLESHOOTING
3-1
INDICATION/ REFERENCE
TROUBLE POSSIBLE CAUSES SECTION
3.1 UNIT WILL NOT COOL
Compressor will not run V-Belt broke or defecti ve Check
Compressor malfunction See Note
Clutch malfunction Check/Replace
Safety de vice open 1.4
Electrical malfunction A/C switch defective Check
A/C relay defective Check/2.3
Low Ambient Thermostat open 1.5.c
Circuit breaker CB6 open Check/Reset
Temperature Controller malfunction 3.5
Run Control Switch in OFF position Check
Liquid Line Solenoid malfunction 4.16
3.2 UNIT RUNS BUT HAS INSUFFICIENT COOLING
Compressor Compressor valves defective See Note
V-belt loose Check
Refrigeration system Abnormal pressures 3.4
No or restricted evaporator air flow 2.3
Expansion valve malfunction 3.7
Restricted refrigerant flow 3.7
Low refrigerant charge 4.9
Service valves partially closed Open
Safety de vice open 1.4
3.3 ABNOR MAL PRES SURE
High discharge pressure Refrigerant overcharge 4.9
Noncondensibles in system Check Pressure
Condenser fan motor rotation incorrect Check/Reverse
Motor Electrical
Leads
Condenser coil dirty Clean
Low discharge pressure Compressor valves(s) worn or broken See Note
Low refrigerant charge 4.9
High suction pressure Compressor valves worn or broken See Note
NOTE: Refer to 05G Compressor manual, Fo rm T-199.