KIMA00H1 (0204)
40
8. PROBLEM SOLVING
TABLE 6 - COMPRESSOR PROBLEM SOLVING
CONDITION POSSIBLE CAUSE SUGGESTED REMEDY
1. Unit will not start. 1. Low supply voltage.
2. Programmable controller problem
3. Power failure.
4. Compressor in alarm.
1. Check fuses or circuit breaker.
2. Check for proper voltage and
connections.
3. Reset alarm condition.
2. Compressor shuts down on
motor overload.
1. Low Voltage.
2. 1st or 2nd stage not in order.
3. Operating pressure too high.
4. 2nd stage suction temp too high.
5. High intercooler pressure.
6. Low intercooler pressure.
1. Check for proper voltage and
connections.
2. Check all operating parameters for
abnormal conditions.
3. Lower pressure within limits of
motor.
4. 2nd stage not in order.
5. 1st stage not in order.
3. Compressor shuts down on
high cabinet temperature.
1. High ambient temp.
2. Dirty dust filters.
3. Dirty coolers.
4. Obstructed cooling air flow.
1. Maximum 104° F (40° C)
2. Clean dust filters (see section 6.7).
3. Clean coolers (see section 6.4).
4. Check for and remove any foreign
material blocking air ducts.
4. High 1st stage discharge air
temperature.
1. Inlet filter plugged.
2. High ambient temp.
3. 2nd stage not in order.
1. Change filter elements.
2. Maximum 104°F (40°C) F ambient
3. Replace 2nd stage
5. High 2nd stage suction air
temperature.
1. Dirty dust filters.
2. Dirty intercooler core.
1. Clean dust filters (see section 6.7).
2. Clean intercooler (see section 6.4).
6. High 2nd stage discharge air
temperature.
1. High second stage discharge
pressure.
2. Dirty intercooler core.
3. 2nd stage element not in order
1. Lower operating pressure to
normal.
2. Clean intercooler (see section 6.4)
7. High compressor discharge
air temp.
1. Dirty dust filters.
2. Dirty aftercooler core.
1. Clean dust filters (see section 6.7).
2. Clean aftercooler (see section 6.4).
8. High oil temperature 1. Oil level too high.
2. Dirty dust filters.
3. Dirty oil cooler core.
4. Gearcase sump breather element
plugged.
1. Lower oil level to center of sight
gauge.
2. Clean dust filters
3. Clean oil cooler (see section 6.4).
3. Replace element
9. Failure to load. 1. Solenoid unloading valve defective.
2. Capacity Control Valve diaphragm
ruptured.
3. Capacity Control Valve bushings
defective.
4. Trouble with pressure transmitters.
5. Manual unload selected.
6. PLC Control not sending signal to
unloading valve.
7. Unloading valve relay defective.
1. Repair or replace unloading valve.
2. Replace diaphragm.
4. Repair Capacity Control Valve.
5. Check transmitter connections and
wiring.
6. Press load button.
7. Check output to unloading valve for
voltage.
8. Replace unloading valve relay.
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