Air Conditioner Service Manual
Electronic Controller
1. Safety Protection
(1) Time Delay for Safety protection
z 3 minutes delay for compressor ---The compressor is ceased for 3minutes before
restarting to balance the pressure in the refriger
ation cycle in order to protect the
compressor.
z 2 minutes delay for 4-way valve---The 4-way valve will be ceased for 2 minutes late
after compressor to prevent the refrigerant-gas abnormal noise
when the HEATING
operation is OFF or switch to the other operation mode.
(2) Discharge temperature protection
There is a temperature sensor on top of compressor, when temperature on top of
compressor exceeded the limit,
system control will shut down the compressor and the
display board will show the error code.
(3) lower voltage protection
When AC voltage ≤158V and keep it for 10 seconds, unit will be shut down for protection.
(4) Over voltage protection
When AC voltage ≥260V
, unit will be shut down and recover while AC≤255V.
(5) Over curr
ent protection
When the current of outdoor unit is overload, contr
oller shut down the unit immediately and
show error code.
(6)
Compressor abnormity protection
When compressor start on or in the process of running, if there is no feedback to controller
or load of compressor is abnormity, the air
conditioner will shut down, and show error
code.
(7) IPM module protection
IPM module has high temperature & over current protection itself, if
there is signal
feedback to IPM, the outdoor unit will shut down, LED on out
door PCB will show the error
code.
2. “I Feel” Mode Operation
(1) When the “I Feel” mode is selected, the operation mode and initial temperature set are
determined b
y the initial room temperature at start-up of the operation except to turn off the
air conditioner and operates it again.
(2) If the mode is change to “I Feel” from other mode, the “I Feel” mode doesn’t operate un
til
compressor stop for more than 3 minutes.
Mode
Initial Room Temperature Initial Set Temperature
COOLING
RT≥26℃ 23℃
DRY
26℃＞RT≥20℃ RT-2℃
HEATING for Heat Pump
FAN for Cooling Only
RT＜20℃ -
z In the “I Feel” mode, when the controller receives the up or down signal of temperature,
the set temperature can adjust by 1℃ upper or lower. The biggest you can adjust by
2℃ upper or lower.
3. “COOLING” Mode Operation
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