24
SS-SVX07B-E4
Maintenance
Table 14 - Troubleshooting
Symptoms
Possible causes
Checks
Corrective action
No cooling or
heating
A. Compressor or fan is not operating.
1. Loose electrical connections.
1. Tighten the connections if necessary.
2. Check the fuses and wiring.
2. Replace the fuses if necessary.
B. The fan is operating but the compressor
does not start.
1. Check the compressor's wiring and
winding resistors.
1. If the check shows the motor windings
are broken or earthed, replace the
compressor.
2. Check the capacitor
2. Replace if necessary.
C. The compressor is operating but the fan
does not start.
1. Check the fan motor, the capacitor or
the wiring.
1. Repair or replace
D. Control switch is defective, incorrectly
wired or adjusted.
1. Check the control switch connections
and the temperature setting.
1. Change the setting. Replace if defective.
Insufficient heating
or cooling
A. Lack of refrigerant fluid.
1. Check there are no leaks.
1. Drain, repair and recharge.
B. Insufficient air volume.
1. Check the air filter.
1. Clean and replace.
2. Check the fin assemblies are clean.
2. Clean if obstructed.
3. Check the fan.
3. If the fan is loose on its shaft, tighten the
fixing bolts.
4. Check the wiring and capacitors.
4. Repair or replace
C. Obstructed capillaries or blocked orifice.
1. Check there is no humidity in the
system.
1. Drain and recharge.
Summary of Contents for MCD 048
Page 27: ...SS SVX07B E4 27 Notes...
