Gree KFR-32GW/NJ1F, Service Manual

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7.4 Common protection function and malfunction display of COOL, HEAT, DRY and AUTO mode
1. Overload protection:
T
tub
: Measure the temperature of outdoor heat exchanger when cooling and measure the temperature of indoor heat exchanger when
heating
◆ When tube temperature exceeds a certain specified value, the indoor fan will run at the set speed and the compressor will stop
running.
◆ When tube temperature is back to normal, the unit will resume running in the original state.
2. Compressor delay protection:
The compressor will delay 3min to start again after stopping.
3. Compressor discharge temperature (Tdis) protection
If the discharge temperature exceeds a certain specified value, the compressor will stop; when the discharge temperature is
detected normal after 3min, the compressor will start to run.
7.5 Other control
1. Emergency control
Auto button:
If the wireless remote control is lost, use this button. Place the switch at this position to set the unit running in AUTO mode. The
indoor fan runs in auto speed and the guide louver runs in SWING mode. The backlight is on in AUTO mode. If this is remote signal,
the unit will run according to remote signal.
Test button:
Place the switch at this position to set the unit running in COOL mode. The indoor fan runs at high speed and the guide louver runs in
SWING mode. The backlight is turned on. If this is remote signal, the unit will run according to remote signal. When the wireless
remote controller is used to select COOL mode, the unit will be turned on in SAVE mode and it will run in COOL mode according to
nominal cooling capacity. The indoor fan runs at high speed and the swing fan runs; when the wireless remote controller is used to
select HEAT mode, the unit will be turned on in SAVE mode and it will run in HEAT mode according to nominal heating capacity.
The indoor fan runs at high speed and the swing fan runs.
Run button:
Place the switch at this position and the unit will run according to the received remote signal.
Stop button:
Place the switch at this position and the whole unit will stop running.
2. Sleep control
◆ When the air conditioner is in COOL or DRY mode, after Sleep mode has been set properly, the preset T
set
will be increased
by 1 ℃ after the sleep program has run for 1 hour, and T
set
will be increased by another 1 ℃ after 2 hours. T
set
has been
increased by 2
℃
totally in two hours. Then the unit will run at this set temperature.
Set temperature Tset
1h 2h
◆
When the air conditioner is in HEAT mode, after Sleep mode has been set properly, the preset T
set
will be decreased by 1 ℃
after the sleep program has run for 1 hour, and T
set
will be decreased by another 1
℃
after 2 hours. T
set
has been increased by 2
℃
totally in two hours. Then the unit will run at this set temperature.