AirStage AO54FJ, Service Manual

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Check Point 1: Check Circuit connection Check Point 1: Check Circuit connection
SERVICE SERVICE PARTS INFORMATION 9 PARTS INFORMATION 9
S V
CN1 CN1
AC LINE
- - 1 1
CN1-3
Check Point 2: Check Solenoid coil Check Point 2: Check Solenoid coil
Remove connectors CN4,CN5, Check if the resistance of coil.
Normal resistance value of each coil :1.5k (approx)
If the resistance value is abnormal Due to cut- off etc. replace
the solenoid coil.
Check Point 3: Check voltage of Solenoid coil Check Point 3: Check voltage of Solenoid coil
If the voltage is abnormal, replace Control PCB.
During normal operation, the voltage between 1- 2 of
CN4 / CN5 is OV. It becomes 220V+ - 20V when it is ON
due to the protection operation etc..
Check Point 4: Check operation of Solenoid Valve Check Point 4: Check operation of Solenoid Valve
Pipe (In)
Pipe (Out)
Pipe (In)
Pipe (Out)
Pipe (In) TEMP. Hi,
Pipe (Out) TEMP.Normal Pipe (In) TEMP. = Pipe (Out) TEMP.
AC AC
SOLENOID COIL
SOLENOID COIL
Normal Operation
Protection Function ,
Pressure Balance condition (3ST)
If the location of valve is not proper, replace the valve.
Check the temperature difference between inlet and Out of the piping if it is function normal depending on the normal
operation control condition.
Check Point 4: Check when Bypass can not be released during norm Check Point 4: Check when Bypass can not be released during norm al operation. al operation.
1.Remove the connector of the desired valve, and
check if the by pass is released.
If it is release, replace Control PCB.
(It is due to defective Relay or Shorted AC line.)
2.If it is not released by above item1., replace the valve.
Clogging due to oxidized film etc.
Deform due to over heating during the valve
installation.
P/No.
9900188016 (VALVE)
P/No.
9900189020 (Solenoid COIL 1)
P/No.
9900189013 (Solenoid COIL 2)
Hi TEMP.
Normal TEMP.
Hi TEMP.
Hi TEMP.
Open CLOSE
Check Connectors CN4,CN5. Also check if cable is broken.
06-51