McQuay MWM Service Guide Book

62
Mini Chiller: Troubleshooting Guide When any malfunction is occurred, immediately switch off the power supply to the unit, and contact the local
dealer, if necessary. Some simple
troubleshooting tips are given below:
Symptoms Possible Causes Remedial Action
1. Compressor does not start
v No power supply v Fuses blown or automatic circuit breakdown
open
v Defective contactor or coil v Unit is stopped because a safety has tripped v Loose wires v Compressor faulty
v Check power supply v Look for short circuit or grounded wires in
motor windings
Replace fuses and reset circuit breakers when the fault has been corrected Check tightness and soundness of all electrical connection
v Repair or replace v Determine the type of safety shut down and
correct the unit is restarted
v Check wire connection and tighten terminal
screw
v Contact local dealer
2. Fan does not start v No power supply
v Fan motor faulty
v Check power supply v Contact local dealer
3. Air conditioning does work, but insufficient cooling
v Thermostat setting too high v Condenser coil dirty v Obstacle blocking air inlet or outlet of the unit v Insufficient refrigerant in the system v Improper water flow rate v Water in the system is contaminated
v Reset thermostat v Contact local dealer v Remove the obstacle v Contact local dealer v Contact local dealer v Contact local dealer

McQuay MWM Specifications

General

Brand	McQuay
Model	MWM
Category	Air Conditioner
Language	English