18
19
Decrease
frequency due
to high air
discharge
F9
Blinks
9 times
Blinks
twice
All loads operate
normally, while
operation frequency for
compressor is
decreased
1. Overload or
temperature is too
high.
2. Refrigerant is
insufficient;
3. Malfunction of
electric expansion
valve (EXV.
20
Limit/decrease
frequency due
to antifreezing
FH
Blinks
2 times
Blinks 2
times
Blinks 4
times
All loads operate
normally, while
operation frequency
for compressor is
decreased
Poor air-return in
indoor unit or fan
speed is too low
21
DC generatrix
voltage is too
high
PH
Blinks 11
times
Blinks 13
times
During cooling,
dehumidifying,
compressor stop
running fan motor
works.
During heating: all
will stop
1. Testing the voltage
of position L and N on
terminal XT, if higher
than 265VAC, please
cut off the power
supply and restart
until back to normal.
2. If input voltage is
normal, testing the
voltage of electrolytic
capacitor C on AP1
after turn on the unit.
There may be some
problem and replace
the AP1 if the
electrolytic capacitor
voltage range at
200-280V.
22
Voltage of DC
bus-bar is too
low
PL
Blinks 21
times
Blinks 12
times
- During cooling and
drying operation,
compressor will stop
while indoor fan will
operate.
- During heating
operation, the
complete unit will
stop.
1. Measure the
voltage of position L
and N on wiring board
(XT), if the voltage is
higher than 150VAC,
turn on the unit after
the supply voltage is
increased to the
normal range.
2. If the AC input is
normal, measure the
voltage of electrolytic
capacitor C on control
panel (AP1), if it’s
normal, there’s
malfunction for the
circuit, please replace
the control panel (AP1)
23
Compressor
Min frequence
in test state
P0
Blinks
0.25Hz
Blinks
0.25Hz
Showing during min.
cooling or min. heating
test
24
Compressor
rated frequence
in test state
P1
Blinks
0.25Hz
Blinks
0.25Hz
Showing during nominal
cooling or nominal
heating test
25
Compressor
Max frequence
in test state
P2
Blinks
0.25Hz
Blinks
0.25Hz
Showing during max.
cooling or max. heating
test
26
Compressor
intermediate
frequence in
test state
P3
Blinks
0.25Hz
Blinks
0.25Hz
Showing during
middle cooling or
middle heating test
27
Overcurrent
protection of
phase current
for compressor
P5
Blinks
0.25Hz
Blinks
0.25Hz
During cooling and
drying operation,
compressor will stop
while indoor fan will
operate;
During heating
operation, the complet
unit will stop operation.
Refer to the
malfunction analysis
(IPM protection, loss
of synchronism
protection and
overcurrent protection
of phase current for
compressor.
28
Charging
malfunction of
capacitor
PU
Blinks 17
times
- During cooling and
drying operation,
compressor will stop
while indoor fan will
operate.
- During heating
operation, the complet
unit will stop.
Refer to the part
three—charging
malfunction analysis
of capacitor.
29
Malfunction of
module temp.
sensor circuit
P7
Blinks 18
times
- During cooling and
drying operation,
compressor will stop
while indoor fan will
operate;
- During heating
operation, the complet
unit will stop
Replace outdoor
control panel AP1
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