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Trouble shooting 18

OUTDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

Check Point 3 : Check Outdoor fan

Indicate or Display:

OKOK

Check Point 1 : Check connections condition in control unit

Excessive high pressure protection

1. Connection failure 2. Outdoor fan operation failure 3. Outdoor heat exchanger clogged

4. Thermistor failure 5. EEV failure 6. Main PCB failure

Check if the terminal connection is loose.

Check if connector is removed.

Check if connector is erroneous connection.

Check if cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Check Outdoor heat exchanger

Is there any obstructing the air flow route?

Is there any clogging of outdoor unit heat exchanger?

>> If clogged, clear the cloge it.

Check Outdoor fan motor. (Refer to Trouble shooting 14)

>> If the fan motor is failure, replace it.

Check Thermistor. (Refer to Trouble shooting 7)

>> If the thermistor is failure, replace it.

Check Point 5 : Check EEV

Check Point 4 : Check Thermistor

Check EEV. (PARTS INFORMATION 3)

>> If the EEV is failure, replace it.

In cooling operation, after 1 minute or more compressor starts,

when outdoor heat exchanger temperature is 68 °C and above.

02-20

Check Point 6 : Replace Main PCB

OKOK

If Check Point 1 ~ 5 do not improve the symptom, replace Main PCB.

Outdoor unit Main PCB

Outdoor fan motor

Heat exchanger temp. thermistor (Out)

Outdoor unit EEV

Refer to error code table.

AMP Air Conditioning

Fujitsu ARC90LHTA User Manual

Questions and Answers: