Fujitsu AS G07LUCA Series Service Instruction page 102

Trouble shooting 42
No Cooling / No Heating
Test 1 : Check Indoor Unit
Does Indoor unit FAN run on HIGH FAN?
Is Air filter dirty?
Is Heat exchanger clogged?
Check if Energy save function is operated.
OK OK
Test 2 : Check Outdoor Unit Operation
Check if Outdoor unit is operating
Check any objects that obstruct the air flow route.
Check clogged Heat exchanger.
Is the Valve open?
OK
Test 3 : Check Site Condition
Is capacity of Indoor unit fitted to Room size?
Any windows open? Or direct sunlight ?
OK
Test 4 : Check Indoor/ Outdoor Installation Condition
Check connection pipe
(specified pipe length & Pipe diameter?)
Check any loose or removed communication line.
>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data & Technical
Manual.
OK
Test 5 : Check Refrigeration Cycle
Check if Strainer is clogged (Refer to the figure at right).
Measure Gas Pressure and if there is a leakage, correct it.
>> When recharging the refrigerant, make sure to perform
vacuuming, and recharge the specified amount.
Check EEV (SERVICE PARTS INFORMATION 3)
Check Compressor (SERVICE PARTS INFORMATION 1,2)
Forecast of Cause :
1. Indoor / Outdoor unit error.
2. Effect by surroudingding environment.
3. Connection pipe / Connection wire failure
4. Refrigeration cycle failure.
PSI PSI
02-57
Attention
Strainer normally does not have temperature difference
between inlet and outlet as shown in
difference like shown in , there is a possibility of inside
clogged. In this case, replace Strainer.
P p i e I ( ) n
P p i e I ( ) n
, but if there is a
P p i e ( O u ) t
P p i e ( O u ) t