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Defrost approaching
Immediately
that T
outdoor coil
<3°C, Defrost timer will be counted. If T
outdoor coil
is more than 3°C over 2
minutes,
Defrost timer will be reset and Defrost function will be operate when
a) Compressor continue operate in heat mode over than 5 minutes and
b)
Defrost timer are in below condition.
? T
outdoor coil
decease from +3 to -8°C (line AB) within 30-60 minutes and still ≤-8°C over than 5
minute
? T
outdoor coil
decease from +3 to -4°C (line AC) within 60-120 minutes and still ≤-4°C over than 5
minute
? T
outdoor coil
decease from +3 to -2°C (line AD) after 120 minutes and still ≤-2°C over than 5 minute
Whil
e Defrost function
Indoor
and outdoor fan motor will stop operation but compressor will operate similar to Cool mode
After
Defrost function finish
Wh
en T
outdoor coil
over than 14°C or operating in defrost function more than 10 minutes, system will turn
back
to operate in Hat mode automatically.
3.7
Pre heat & Post heat functions
Pre heat function help to protect indoor fan motor to blow cool air in Heat mode while compressor operate.
? When T
indoor coil
is lower than 30°C, fan motor will stop operation.
? When T
indoor coil
is in between 30-37°C, fan motor will operate at low speed.
? When T
indoor coil
is more than 37°C, fan motor will operate at setting speed.
Post
heat function help to protect indoor fan motor to blow cool air in Heat mode while compressor operate.
? When T
indoor coil
is more than 30°C, fan motor will operate at setting speed.
? When T
indoor coil
is in between 18-30°C, fan motor will operate at low speed.
? When T
indoor coil
is lower than 18°C, fan motor will stop operation.
In
case of model that doesn’t have indoor coil sensor, function Post heat will operate as below.
? Fan motor operate at low speed when compressor start operation for 30 seconds. After that fan
motor
will operate at setting speed.
? Fan motor will stop operation after compressor stop operation for 30 seconds.
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