Air Conditioner Service Manual
com pressor
4-way valve
outdoor fan m otor
≤ 10m
ON
OFF
ON
OFF
ON
OFF
20s 10s 20s 10s
In defrosting, LED showing by winking.
Come into or out of defrosting, indoor fan motor speed is the same as Cold Air Prevention
C
ontrol.
One of the following conditions is satisfied, unit come out of defrosting and shift to heating
mode:
a. Outdoor coil Temperature (OPT) ≥15℃
b. Defro
st time keep time for more than 10 minutes.
(5) Indoor exchanger overheat protection
When Indoor exchanger Temperature(IPT) is higher than 55 ℃ , unit come into indoor
exchanger overheat prot
ection. Compressor drop its frequency toward to F1 level until IPT≤52
℃; If IPT≤52℃ and keep for 5 minutes , control system don’t limit running frequency.
If IPT>62℃, control system shut down compressor, and re
cover when IPT drop less than 50℃.
6. “SLEEP” mode
When the SLEEP button is pressed, the SLEEP
mode is selected as following:
z The indoor fan speed is set at low speed, the power lamp and the sleep lamp is on, th
e
display of temperature will be close after 5 minutes.
z When selecting COOLING/DRY operation with SLEEP mode, the set temperature will be
raised by 1℃ 1 hour later and b
y 2℃ 2 hour later.
z When selecting HEATING operation with SLEEP mode, the set temperature will be dropped
by 1℃ 1 hour later and 2℃ 2hour later.
z Af
ter the System operates in SLEEP mode for 8 hours, it will stop automatically.
7. EMERGENCY Operation
When th
e EMERGENCY Operation switch is pressed once, C
OOLING mo
de is selected and
if
in 3 se
conds
the EMER
GENCY Operation switch is pressed again, mode is selected. Then
pressed once again, the unit is switch off.
When the remote controller is missing, has failed or the batteries run down, press the
EMERGENCY Operation switch on the
front of the indoor unit. The unit will start.
The first 30 minutes of operation will be the test run operation. The operation is for servicing.
The indoor fan runs at high speed and the system is in
continuous operation. The thermostat is
ON and the timer is reset to normal.
After 30 minutes of test run operation the system shifts to AUTO COOLING/HEATING mode,
and the indoor fan runs in automatic speed. The operation continues unit the EMERGENCY
operation switch is pressed or a button on the remote controller is pressed, the normal
operation will start.
NOTE: Do not press the EMERGEMCY Operation switch during normal operation.
8. AUTO-RESTART Function (Option)
1. When air
conditioner is operating in one mode, all of it
s op
eration dat
a, such
as working
mode and te
mperature of setup would be memorized into IC by main PCB. If power cuts due to
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