MovinCool 24HFU Service Manual - Manual (Page 27)

MOVINCOOL 24HFU / 24HFU-1 SERVICE PAGE 27
REPAIR - TROUBLESHOOTING
TROUBLE SYMPTOM POSSIBLE CAUSE REMEDY
Unit does Unit does 1) Defective control switch Refer to 4-2
not operate not operate 2) Defective auxiliary relay Refer to 4-1
3) Defective drain switch Refer to 4-5
Unit starts, 1) Defective overload relay Refer to Wiring Diagram
but stops 2) Defective fan motor Refer to 4-6
immediately 3) Defective compressor motor Refer to 4-7
Unit operates, 1) Defective compressor motor Refer to 4-7
but stops after 2) Defective overload relay Refer to Wiring Diagram
a few minutes 3) Defective high pressure switch Refer to 4-10
Water leakage 1) Defective drain pan (crack or hole) Repair
from the unit 2) Defective drain hose Repair or replace
(clogged or loose connection)
Before troubleshooting this system, the following inspection should be performed.
1-1. Inspection of Power Source Voltage
Check the voltage of the power source.
24HFU & 24HFU-1: Single phase 230 volts (60Hz)
Check the operation and condition of the fuse or circuit breaker in the power source.
1-2. Inspection of Air Filters
Remove the air filters and check the element. If it is dirty, wash it as described in the OPERATION
MANUAL supplied with the unit.
1-3. Inspection of Drain Tank
Be sure tank is fully drained.
The following chart is provided as a guide for categorized problem remedies. Detailed information is
contained in the OPERATION MANUAL supplied with the unit.
Abnormal 1) Loose compressor mounting nut Tighten
noise and 2) Deformed or worn rubber grommet Replace
shaking on the compressor mounting bolt
3) Interference with other materials.
Remove it
4) Interference of fan and scroll Readjust
Insufficient 1) Clogged spine fin and/or air filter Refer to 2-1 and/or
velocity of wash the air filter
cooled air 2) Defective fan motor Refer to 4-6
3) Defective fan motor capacitor Refer to 4-3
Insufficient Compressor and 1) Abnormal environment condition Refer to 2-2
cooling fan motor rotate 2) Clogged spine fin Refer to 2-1
properly 3) Leak in system Refer to 5-1
4) Clogged refrigerant system Refer to 5-1
Compressor motor 1) Defective compressor motor Refer to 4-7
does not rotate 2) Defective compressor capacitor Refer to 4-3
3) Defective auxiliary relay Refer to 4-1
4) Defective control switch Refer to 4-2
5) Defective overload relay Refer to Wiring Diagram
6) Defective wiring connection Check and correct
7) Defective thermostat Refer to 4-9
8) Defective compressor relay Refer to 4-11
Cooled air Blower motor does 1) Defective fan motor Refer to 4-6
does not not rotate 2) Defective fan motor capacitor Refer to 4-3
come out 3) Defective wiring connection Refer to 4-8
4) Defective auxiliary relay Refer to 4-1
■ TroubleShooting Chart