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7.4
Protection
7.4.1
3 minutes delay at restart for compressor.
7.4.2
Sensor protection at open circuit and breaking disconnection
7.4.3
Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High Fan+300RPM)or
too low(lower than 400RPM), the unit stops and LED displays failure information and can't returns to
normal operation automatically.
7.4.4
Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit stops and LED
displays failure information and can't returns to normal operation automatically.
7.4.5
The current protection of the compressor
Current up
Current down
If compressor turns off for continuously 4 times due to current protection in 5 minutes from
Compressor On, the unit stops and LED displays failure information and can't returns to normal
operation automatically.
7.5 Fan-only mode
Fan speed is high/mid/low/ Auto
7.6 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:
Room temp. up
Room temp. down
Auto fan at cooling mode:
Room temp. up
Room temp. down
Condition
Indoor fan
I< I
RESTORE
I
<I< I
RESTORE
FAN
I
<I<I
FAN
5MIN
I
<I< I
5MIN
3SEC
I
<I< I
5MIN
3SEC
I
<I<I
FAN
5MIN
I
<I< I
RESTORE
FAN
I< I
RESTORE
Condition
T=Indoor Temp.
Ts=Setting Temp.
T> Ts+1
T<Ts+1
T> Ts
T<Ts
Condition
T=Indoor Temp.-Setting Temp.
T<4℃
4℃<T<5℃
T>5℃
T> 4℃
1 <T<
℃
4℃
T<1℃
Compressor
On
On
On
On
Low speed
On
Off
Off
Off
Off
On
On
Low speed
On
On
On
Compressor
On
Off
On
Off
21
Outdoor fan
On
Off
On
Off
Off
Off
Off
Off
On
On
Outdoor fan
On
Off
On
Off
Indoor fan speed
Low
Med.
High
High
Med.
Low
Remark
Heating mode
Cooling mode
After 5 Minutes
After 3 Seconds
After 3 Seconds
After 5 Minutes
Heating mode
Cooling mode
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