4. W-2WAY ECO-i Alarm Codes

W-2WAY ECO-i SYSTEM Trouble Diagnosis

F08 Alarm

Alarm code

F08

 

 

Alarm meaning

Outdoor air temperature sensor trouble

Alarm conditions

(1)

A/D step is 10 steps or less (short circuit).

 

(2)

A/D step is 1014 steps or more (open circuit)

Probable cause

(1)

Sensor malfunction (including connector)

 

(2)

PCB malfunction

Check

(1)

Measure the sensor resistance. Check that the sensor is operating normally.

 

(2)

Use a remote controller monitor or PC monitor to check the temperature that is recognized by

 

 

the microcomputer.

Correction

—

 

Example

—

 

Notes

—

 

F12 Alarm

 

 

 

 

Alarm code

F12

 

 

Alarm meaning

Compressor intake temperature sensor trouble

Alarm conditions

(1)

A/D step is 10 steps or less (short circuit).

 

(2)

A/D step is 1014 steps or more (open circuit)

Probable cause

(1)

Sensor malfunction (including connector)

 

(2)

PCB malfunction

Check

(1)

Measure the sensor resistance. Check that the sensor is operating normally.

 

(2)

Use a remote controller monitor or PC monitor to check the temperature that is recognized by

 

 

the microcomputer.

Correction

—

 

Example

—

 

Notes

—

 

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Sanyo CHDX07263, CHDXR07263, CHDXR09663, CHDX09663 service manual F08 Alarm Alarm code, F12 Alarm Alarm code
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