Service manual
18
9
Electronic function
9.1 Display board
①
Auto indicator
This indicator illuminates when the air conditioner is in AUTO operation.
②
Timer indicator
This indicator illuminates when TIMER is set ON/OFF.
③
PRE.-DEF. Indicator (For Cooling & Heating models only)
This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air
control feature is activated in heating mode.
④
OPERATION indicator
This indicator illuminates when the air conditioner is running.
9.2
Protection
10.2.1 3 minutes delay at restart for compressor.
10.2.2 Temperature protection of compressor top, compressor stops when the temp. of top of
compressor is more than 115
℃
, compressor runs when the temp. of top of compressor is less than
100
℃
.
10.2.3 Voltage protection, unit stops when the voltage is more than 260V and less than 175V.
10.2.4 Inverter module Protection, Inverter module Protection itself has a protection function against
current, voltage and temperature.
10.2.5 Sensor protection at open circuit and breaking disconnection
10.2.6 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than 2100RPM)or too
low(lower than 300RPM), the unit stops and LED displays failure information and can’t return
to normal
operation automatically.
10.2.7Cross Zero signal error warning. If there is no Cross Zero signal in 4 minutes, the unit stops and
LED displays failure information and can’t return to normal operation automatically.
9.3 Fan-only mode
The compressor
、
4-way valve and outdoor fan is off at fan-only mode. The setting temperature
can not be changed. Fan speed can be selected as high/mid/low/ auto.
9.4 Cooling mode
9.4.1 The 4-way valve is closed at cooling mode.
9.4.2 Action of compressor at cooling mode: compressor must run for 7 minutes after starting and then
judge the difference between setting temperature and room temperature. Meanwhile other
protections are still valid.
℃
3.5
3.0 A
2.5 B
2.0 C
1.5 D
1.0 E
0.5 F
-0.5 G
-1.0
H
