Rittal SK 3290500 - 9. Fault Indication and Fault Analysis

9. Fault Indication and Fault Analysis:
Fault No. Nature of Fault Cause Remedy
1
Temperature inside the
enclosure too high
Cooling output too low (lack of
coolant)
Consequential fault or faults 2-7
Check cooling output
Carry out cooling service
2 Compressor
Compressor overloaded (internal
winding protection)
Unit will switch on
automatically
Defect (check by measuring the
resistance of the winding)
Replace as part of cooling
service
Relay or feed cable faulty Replace power PCB
3 Evaporator
Operational indication if risk of icing
up exists
Raise the setpoint value of
the internal temperature of
enclosure
Lack of coolant Carry out cooling service
4 High-pressure monitor Ambient temperature too high
Unit's specified range of
application exceeded
Condenser contaminated Clean
Filter mat contaminated Clean or replace
Condenser fan defective Replace
"E" valve defective Carry out of cooling service
Defective
Replace as part of cooling
service
5 Condenser fan Blocked or defective Replace
6 Evaporator fan Blocked or defective Replace
7 Filter monitoring Filter mat contaminated Clean or replace
8 Temperature sensor Cable break or short-circuit Replace
9 Phase monitoring Incorrect field of rotation Reverse two phases