Fujitsu ASG30LMTA Service Instruction page 66

Trouble shooting 30
OUTDOOR UNIT Error Method:
4-Way Valve Error
Detective Actuators:
Indoor unit Controller PCB
Heat Ex. temperature thermistor
Room temperature thermistor
4-way valve
Forecast of Cause :
1. Air filter clogged
5. 4-way valve failure 6. Controller PCB failure
Check Point 1 : Check the Air filter condition
Check is Air filter dirty.
>>If the Air filter dirty, clean up the Air filter.
OK OK
Check Point 2 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
OK OK
Check Point 3 : Check each thermistor
Isn't it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor (Refer to Trouble shooting 11, 12),
If defective, replace the thermistor
OK OK
Check Point 4 : Check the solenoid coil and 4-way valve
[ Solenoid coil ]
Remove CN30 from PCB and check the resistance value of coil.
Resistance value is 2.085
>> If it is Open or abnormal resistance value, replace Solenoid Coil.
[ 4-way valve ]
Check each piping temperature,
and the location of the valve by the temperature difference.
>> If the value location is not proper, replace 4-way valve.
OK OK
Check Point 5 : Replace Controller PCB
If Check Point 1- 3 do not improve the symptom, replace Controller PCB.
AMP Air Conditioning
Indicate or Display:
Indoor Unit :
Operation lamp: 9 times Flash,
Timer lamp
Detective details:
When the indoor heat exchanger temperature is compared with
the room temperature, and either following condition is detected
continuously two times, the compressor stops.
Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 10degC
Heating operation
[Indoor heat exchanger temp.] - [room temp.] < -10degC
If the same operation is repeated 5 times, the compressor stops permanently.
2. Connector connection failure
(at 20°C).
Wired Remote Controller :
ERROR CODE : [E : 99]
: 9 times Flash
3. Thermistor failure
02-33
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4. Coil failure