Heating operation
Frost detection
Reverse-cycle defrosting operation
Defrosting Sequence
Releasing of defrosting
● Compressor ON
● 4-way valve ON
Frosting is assumed mostly under the following condition.
●
Integrated operating time of compressor is longer
than 3 hours.
● Defrosting operation lasts 7 to 12 minutes (maximum).
● Compressor current during reverse-cycle defrosting
operation exceeds certain ampere.
●
●
●
●
Compressor ➞
ON
Outdoor fan ➞ OFF
4-way valve ➞
OFF
Indoor fan ➞ Cold draft prevention mode
●
Indoor heat exchanger coil temperature drops 0.8°C
per 6 minutes and it repeats 3 times in succession.
● Temp. of indoor heat exch. coil immediately before
thermo goes off is below (35 + 5.6) °C, etc.
●
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