M01W45H6-06
WSAT-SC
75C-180F
- TROUBLESHOOTING -
48
COMPRESSOR PROTECTIONS
1. Identify the part on the wiring diagram
2. Are the electric contacts / terminals loose? Are the wires broken or damaged?
3. Check electric coil continuity using a tester.
4. Is vacuum power voltage below the limits?
5. Check the power contactors and relative contacts.
6. Is take-off power voltage lower than the limits?
7. Check electric input
8. Compressor discharge temperature higher than 120°C? Yes > check the thermostat and the coolant level.
FAN PROTECTIONS
1. Identify the part on the wiring diagram
2. Is the fan blocked manually? Check the bearings and drive belt (if fitted)
3. Are the electric contacts / terminals loose? Are the wires broken or damaged?
4. Check electric coil continuity using a tester
5. Is vacuum power voltage below the limits?
6. Check electric input
PUMP PROTECTION
1. Identify the part on the wiring diagram
2. Is the pump blocked manually? (If it is a circulation pump, it could happen after long periods without use)
3. Are the electric contacts / terminals loose? Are the wires broken or damaged?
4. Check electric coil continuity using a tester
5. Is vacuum power voltage below the limits?
6. Check electric input
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