RefPlus EK Series - Troubleshooting Chart; Replacement Parts

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TROUBLESHOOTING CHART
10. TROUBLESHOOTING CHART
PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS
Fan(s) will not
operate
1. Main switch open.
2. Blown fuses.
3. Defective motor.
4. Defective timer or defrost thermostat.
5. Unit in defrost cycle.
6. Coil does not get cold enough to reset
thermostat.
1. Close switch.
2. Replace fuses. Check for short circuits or
overload conditions.
3. Replace motor.
4. Replace defective component.
5. Wait for completion of cycle.
6. Adjust fan delay setting of thermostat.
Room temperature
too high
1. Room thermostat set too high.
2. Superheat too high.
3. System low on refrigerant.
4. Coil iced-up.
1. Adjust thermostat.
2. Adjust thermal expansion valve.
3. Add refrigerant.
4. Manually defrost coil and check defrost
controls for malfunctions.
Ice accumulating
on ceiling around
evaporator and/or
on fan guards,
venturi, or blades
1. Defrost duration is too long.
2. Fan delay not delaying fans after defrost
period.
3. Defective defrost thermostat or timer.
4. Too many defrosts.
1. Adjust defrost termination thermostat.
2. Defective defrost thermostat or not
adjusted properly.
3. Replace defective component(s).
4. Reduce number of defrost.
Coil not clearing of
frost during defrost
cycle
1. Coil temperature not getting above freezing
point during defrost.
2. Not enough defrost cycles per day.
3. Defrost cycle too short.
4. Defective timer or defrost thermostat.
1. Check heater operation.
2. Adjust timer for more defrost cycles.
3. Adjust defrost thermostat or timer for
longer cycle.
4. Replace defective component.
Ice accumulating in
drain pan
1. Defective heater.
2. Unit not pitched properly.
3. Drain line plugged.
4. Defective drain line heater.
5. Defective timer or thermostat.
1. Replace heater.
2. Check pitch and adjust, if necessary.
3. Clean drain line.
4. Replace heater.
5. Replace defective component.
Uneven coil
frosting
1. Defective heater.
2. Unit located too close to door or opening.
3. Defrost termination set too low.
4. Incorrect or missing distributor nozzle.
1. Replace heater.
2. Relocate unit.
3. Adjust defrost termination setting higher.
4. Add or replace nozzle with appropriate
sized orice for conditions.
11. REPLACEMENT PARTS
Download the parts manual at refplus.com