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Repair Section

7.3 Troubleshooting Chart

• To accurately troubleshoot the problem, it is important to carefully confirm the nature of the

problem. Typical problems are:

- Insufficient cooling.

- Unit does not start (operate).

- Overflow of drain water.

- Abnormal noise or vibrations.

- Others.

(1) Insufficient cooling

• Cooling system problem generally results from electrical or mechanical components such as fan

motor, compressor, control switch.

< NOTE >

• There is a possibility of insufficient cooling due to clogging of the air filter. So make sure to first

check if the air filter is clogged or not.

• Check the power supply because of the possibility of power source failure.

• Check the installation site for operating temperature and installation space (unobstructed airflow).

Activation of high

pressure switch

When high pressure switch

(connected to J104) activates

(=J104 input turns to open) 3 times

in 24 h, “HP” is indicated and signal

output (J106) turns on.

When it activates 10 times in 24 h,

“FAIL HP” is indicated and buzzer

sounds.

Find the cause of high pressure to

address it.

Check the following.

Ambient air temperature

(65 °F (18.3 °C), 50 %RH⇔

95 °F (35 °C), 60 %RH)

Air filter (if dirty, wash up.)

Condenser fan motor (if not

working, replace.) Defect of high

pressure switch (if switch is open

when unit is off, replace switch.)

Reset the system.

To RESET: Press ON/OFF and

HI/LO buttons on the control box

simultaneously for 5 sec.

LCD Display Description Condition Reset/Remedy

SET TEMP

COOL

FAN

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 68 69

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Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Manuale di Servizio Pagina 34

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