Trouble shooting 23
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 3 : Check Point 2 : Check voltage of Main PCB (DC5.0V)
PRESSURE SWITCH 1
RED
CN37
1
2
PRESSURE SWITCH 2
WHITE
CN36
1
2
Check Point 1 : Reset Power Supply and operate
Check Point 3 : Check Pressure Switch
High Pressure Switch Error
Outdoor Unit Main PCB Circuit
Pressure Switch
1. Connector connection failure 2. Pressure Switch failure 3. Main PCB failure
Does abnormal LED indication show again?
Make sure circuit diagram of outdoor unit and check terminal voltage
at Pressure Switch. (DC5.0V)
If the voltage does not appear, replace Main PCB.
>> If no abnormal connection is found,
replace Pressure Switch.
After replacing Pressure Switch, check operating
condition and pressure in operation.
02-27
Refer to error code table.
OK
PRESSURE SWITCH 1 (CN37)
Pressure switch 1
608.7 14.5 PSI
Characteristics of pressure switch
Pressure switch 2
536.2 29.0 PSI
Contact : Open Short
Contact : Short Open
420.1 29. 0PSI
PRESSURE SWITCH 2 (CN36)
Contact : Open Short
Contact : Short Open
463.8 21.7 PSI
Check if connector is loose or cable is open.
When pressure switch open is detected in 10 seconds
after the power is turned on.
NO
YES
WHITE
RED
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