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