Movincool Office Pro 10 Service Manual download pdf (Page 28)

TROUBLESHOOTING AND REPAIR

5. Troubleshooting Chart

Unit does not operate at all • Check for Power at

Receptacle

•Fan mode DIP switch is set to

“Stop” and current Set Point

Temperature exceeds Room

Temperature

•Fan mode DIP switch is set to

“Stop” and unit has

Condensate Pump that is

defective

• Check for Power at Terminal

Block

• Check for Power at Relay

Board

• Check all wire connections

• Defective Drain Tank Switch

• Check Relay Board Fuse

•

Defective or Incorrect Relay

Board

• Defective Control Board

Unit starts, but stops immediately • Room temperature and

antifreeze thermistor

connectors are reversed on

control board

• Defective Fan Motor

• Defective Compressor Motor

• Defective Relay Board

Unit operates, but stops after a • Drain Tank Switch activated

few minutes • Fan Mode Switch is set to

“Stop” and unit reached “set

point” temperature so

compressor cycled off

• Defective Compressor Motor

• Defective Fan Motor

•Fan Mode Switch is set to

“Stop” and compressor

cycled off

Water leakage from the unit • Condensate pump not

working

• Drain Tank not installed

• Drain Tank (if available) is

defective (cracked)

• Drain Pan hole is obstructed

• Drain hose kinked

Abnormal noise and/or shaking • Loose Compressor mounting

nut

• Deformed or worn rubber

grommet on the compressor

mounting bolt

• Internal interference with

other components

• Damaged or out of balance

fan

Trouble Probable Cause

Unit is not responding to control • Unit is in the programming mode

board / buttons. No diagnostic and locked out. Press the RUN

code is shown. and SET buttons simultaneously.

Insufficient Air Flow • Clogged fins on Evaporator or

Condenser (running unit without

filter(s))

•Fan on “Low” setting

• Defective fan motor

• Static pressure exceeds design

specifications

Insufficient Cooling • Environmental conditions exceed

design specifications

• Clogged air filter

• Clogged fins

• Set point temperature exceeds

room temperature

• Defective room temperature

thermistor

• Exhaust outlet not properly

ducted

• Leak in refrigerant system

• Restriction in refrigerant system

Display not working • Compressor not operating

Compressor not operating • Set point temperature exceeds

room temperature

• Unit is operating in Fan Only

Mode (Cool Mode not activated)

• Defective Condensate Pump

• Defective Compressor Capacitor

• Defective Thermistor

• Defective Compressor Motor

• Check wiring connections

• Defective Relay Board

• Defective Control Board

Evaporator or Condenser Fan • Fan mode DIP switch is set to

Motor(s) not operating “Stop” and current Set Point

Temperature exceeds Room

Temperature

•Fan mode DIP switch is set to

“Stop” and unit has Condensate

Pump that is defective

• Check wire connections

• Defective fan motor capacitor

• Defective fan motor

• Defective Relay Board

• Defective Control Board

Trouble Probable Cause

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Movincool Office Pro 10 Service Manual Page 28

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