3-4. No cooling/No heating
Forecast of cause
Check point 1. Check Indoor unit
•
Does Indoor unit fan run in the HIGH mode?
•
Is air filter dirty?
•
Is heat exchanger clogged?
•
Check if energy save function is operated.
Check point 2. Check outdoor unit operation
•
Check if outdoor unit is operating.
•
Check any objects that obstruct the air flow route.
•
Check if heat exchanger is clogged.
•
Is the valve open?
Check point 3. Check site condition
•
Is capacity of Indoor unit fitted to the room size?
•
Any windows open or direct sunlight?
Check point 4. Check Indoor/ Outdoor installation condition
•
Check connection pipe (specified pipe length and pipe diameter?)
•
Check any loose or removed communication line.
→ If there is an abnormal condition, correct it by referring to the installation manual or the "DESIGN
& TECHNICAL MANUAL".
Check point 5. Check Refrigeration cycle
•
Check if strainer is clogged (Refer to the figure below).
•
Measure gas pressure, and if there is a leakage, correct it.
•
Check if EEV open or there is a capillary tube defect.
Refer to outdoor unit Electrronic Expansion Valve (EEV) or Capillary tube in
"Service parts information"
•
Check compressor.
Refer to compressor in
Refer to inverter compressor in
NOTE: When recharging the refrigerant, make sure to perform vacuuming,
and recharge the specified amount.
3-4. No cooling/No heating
↓
↓
↓
↓
on page 03-39.
"Service parts information"
"Service parts information"
↓
End
- (03-35) -
Indoor unit error
Outdoor unit error
Effect by surrounding environment
Connection pipe/Connection wire failure
Refrigeration cycle failure
on page 03-39.
on page 03-39.
MPa MPa
3. Troubleshooting without error code