Troubleshooting - McQuay C Serie Installationsanleitung

Under normal circumstances, these chillers required only a check and cleaning of air intake through the coil surface. These
can be done monthly or quarterly depending on the surrounding where the units are installed.
When the surrounding is very oily or dusty, then the coils must be regularly cleaned by a qualified air condition service
technician to ensure sufficient cooling capacity and efficient unit operation. The normal life span might be shortened if no
proper service is provided.
• Maintenance
For consistent performance and durability, always conduct proper and regular maintenance to the unit.
For prolong period of operation time, the heat exchanger will become dirty impairing its effectiveness and reducing the
performance of the units. Consult your local dealer about the cleaning of the heat exchanger.
No major maintenance or servicing is needed for the internal water circuit in the unit except the water pump failure. It is
advisable to conduct regular check on the filter and change the water filter if it is dirty or choked.
Always check the water level in the system in order to protect the moving components in the hydraulic kit from over heating
and excessive wear.
• Do not attempt to do any service or maintenance when the unit is operating.
• Do not spray any chemical agents or flammable agents to the unit. It could cause fire or explosion.
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
1. Compressor does • No power supply.
not start. • Fuses blown or automatic circuit break-
• Defective contactor or coil.
• Unit is stopped because safety device has
• Loose wires.
• Compressor faulty.
2. Fan does not work. • No power supply.
• Fan motor faulty.
3. Unit does work,
• Thermostat setting too high.
but insufficient • Condenser coil dirty.
cooling. • Obstacle blocking air inlet or outlet of the
• Insufficient refrigerant in the system.
• Improper water flow rate.
• Water in the system is contaminated.
• No water in the system.
4. Flow Switch Error
• Low water level in the system.
• Troubleshooting must be performed by qualified personnel.
! ! ! ! ! CAUTION

TROUBLESHOOTING

POSSIBLE CAUSES
down open.
tripped.
unit.
! ! ! ! ! CAUTION
REMEDIAL ACTION
• Check power supply.
• 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 connections.
• Repair or replace.
• Determine the type of safety shut down and
correct the default before the unit is restarted.
• Check wire connections and tighten terminal
screws.
• Contact local dealer.
• Check power supply.
• Contact local dealer.
• Reset thermostat.
• Contact local dealer.
• Remove the obstacle.
• Contact local dealer.
• Contact local dealer.
• Contact local dealer.
• Check water supply.
• Check water supply.
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