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Shinco Service Manual
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4.9 Refrigerant charge mode
Entry condition：
Press the emergency switch over 5 seconds, there will be three “DU” sound in the indoor unit, and start
the unit with the remote controller.
Actions
：
1. On cooling mode, the indoor fan speed is low
the frequency is fixed on F6,
2. Cancel the mode
：
Turn off the air conditioner with remote controller
5. Protection
5.1 Compressor protection
5.1.1 High pipe discharge temperature protection
When discharge pipe temperature is higher than T3, the compressor frequency will
be lowered, when discharge pipe temperature lower to T1, the frequency will rise, and the
frequency will be limited one class than former one. When the discharge pipe temperature
lower to T2 and keep for 10 minutes, the frequency will return to former one.
When discharge pipe temperature is higher than T4, the compressor stop and the
outdoor motor stop 15s later. When discharge pipe temperature lower to T1 and the unit
restart after 3 minutes.
T1 T2 T3 T4
KFR-25GWZ/BM
KFR-35GWZ/BM
KFR-50GWZ/BM
KFR-70GWZ/BM
90 95 105 110
5.1.2 Sensor protection
There is thermal sensor on compressor, and the compressor will stop when the temperature is too
high, and the outdoor motor will stop 15s later. When the temperature return normal value, the
compressor will restart 3 minutes later.
5.1.3 Compressor relay start protection
The compressor will restart 3 minutes after stop.
5.2 Current protection
When outdoor current is higher than I1, the compressor frequency will be limited and prohibited to rise. When the
current is higher than I2, and the compressor frequency will lower until the current is lower than I1.
When outdoor current is lower than I3, the compressor will stop.
The detailed current value see below table: