84 OM WGZC-1
PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS
Compressor
Loses Oil
8. Lack of refrigerant.
9. Velocity in risers too low (A-C only).
10. Oil trapped in line.
1. Check for leaks and repair. Add
refrigerant.
2. Check riser sizes.
3. Check pitch of lines and refrigerant
velocities.
Motor Overload
Relays or Circuit
Breakers Open
1. Low voltage during high load conditions.
2. Defective or grounded wiring in motor or
power circuits.
3. Loose power wiring.
4. High condensing temperature.
5. Power line fault causing unbalanced
voltage.
6. High ambient temperature around the
overload relay
1. Check supply voltage for excessive line
drop.
2. Replace compressor-motor.
3. Check all connections and tighten.
4. See corrective steps for high discharge
pressure.
5. Check Supply voltage. Notify power
company. Do not start until fault is
corrected.
6. Provide ventilation to reduce heat.
Compressor
Thermal Switch
Open
1. Operating beyond design conditions.
2. Discharge valve partially shut.
4. Add facilities so that conditions are within
allowable limits.
5. Open valve.
Freeze Protection
Opens
1. Thermostat set too low.
2. Low water flow.
3. Low suction pressure.
3. Reset to 42°F (6°C) or above.
4. Adjust flow.
5. See “Low Suction Pressure.”
Warranty Statement
Limited Warranty
Consult your local Daikin McQuay Representative for warranty details. Refer to Form 933-43285Y. To
find your local Daikin McQuay Representative, go to www.daikinmcquay.com.
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