TROUBLESHOOTING

10. Disassembly Instructions


9. Troubleshooting
Safety

Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity
power in capacitor.

Electrolytic Capacitors
(HIGH VOLTAGE! CAUTION!)

For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, -
terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

Note: The picture above is only for reference. The plug of your side may be different.

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9.1 Indoor Unit Error Display
Operation
Timer lamp Display LED STATUS
lamp
☆ 1 time X E0 Indoor unit EEPROM parameter error
☆ 2 times X E1 Indoor / outdoor units communication error
☆ 3 times X E2 Zero-crossing signal detection error
☆ 4 times X E3 Indoor fan speed has been out of control
Indoor room temperature sensor T1 open circuit or short
☆ 5 times X E4
circuit
Evaporator coil temperature sensor T2 open circuit or
☆ 6 times X E5
short circuit
☆ 7 times X EC Refrigerant leakage detection

☆ 1 times O F0 Overload current protection

Outdoor ambient temperature sensor T4 open circuit or
☆ 2 times O F1
short circuit
Condenser coil temperature sensor T3 open circuit or
☆ 3 times O F2
short circuit
Compressor discharge temperature sensor T5 open
☆ 4 times O F3
circuit or short circuit
☆ 5 times O F4 Outdoor unit EEPROM parameter error
☆ 6 times O F5 Outdoor fan speed has been out of control
☆ 1 times ☆ P0 IPM malfunction or IGBT over-strong current protection
☆ 2 times ☆ P1 Over voltage or over low voltage protection
High temperature protection of compressor top
☆ 3 times ☆ P2
diagnosis and solution(only for 9k,12k models)
☆ 4 times ☆ P3* Outdoor ambient temperature too low.
☆ 5 times ☆ P4 Inverter compressor drive error
☆ 6 times ☆ P5 Indoor units mode conflict (multi-zone ONLY)
O（light） X（off） ☆（flash）

*P3
1) In heating mode, when the outdoor temperature is lower than -25 for 1 hour, the indoor unit display error
code P3.
2) If the OUTDOOR temperature is higher than -22c for 10 minutes and compressor stop for 1 hour OR outdoor
temperature is higher than -5C for 10 minutes, then the unit will return to work.

2
9.2 Outdoor unit error display(TBD)
9.3 Diagnosis and Solution
9.3.1 EEPROM parameter error diagnosis and solution(E0/F4)
Error Code E0/F4

Malfunction decision Indoor or outdoor PCB main chip does not receive feedback
conditions from EEPROM chip.
Supposed causes ● Installation mistake
● PCB faulty
Trouble shooting:

Power off, then restart the

unit 2 minutes later.

Yes

Replace the indoor/outdoor

main PCB.

EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed
voltage. For the location of EEPROM chip, please refer to the below photos.

Indoor PCB Outdoor PCB

Note: The two photos above are only for reference, it’s may be not same totally with the ones on
your side.

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9.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1)
Error Code E1

Malfunction decision Indoor unit does not receive the feedback from outdoor unit during
conditions 110 seconds and this condition happens four times continuously.
Supposed causes ● Wiring mistake
● Indoor or outdoor PCB faulty
Trouble shooting:

Power
Power off,
f , then
off
ff then restart
restart the
the unit
unit 22 minutes
minutes later
later

Yes

Measure
Measure Vs, Vs, is
is itit positive
positive fluctuation?
fluctuation?
(Vs
(Vs is
is the
the voltage
voltage between
between 22 and
and 33 of
of No
* outdoor
outdoor unit.
unit. Red
Red pan-3,
pan-3, Black
Black pan-2)
pan-2)

Yes

Check
Check the
the outdoor
outdoor wiring
wiring connection
connection

Yes Check
Check the
the indoor
indoor wiring
wiring connection
connection

Yes
Check
Check whether
C whether reactor
reactor
Replace
Replace the
the reactor
reactor No
is
is normal?
normal? Replace
Replace the
the indoor
indoor main
main PCB.
PCB.
C
Power
Power on.
on. IsIs the
the error
error
extinguished?
extinguished?
g

Yes No

Replace
Replace the
the outdoor
outdoor main
main PCB.
PCB.
Power
Power on.
on. Is
Is the
the error
error Replace
Replace the
the outdoor
outdoor main
main PCB.
PCB.
extinguished?
extinguished?

No

Replace
Replace the
the indoor
indoor main
main PCB.
PCB.

* Vs is the voltage between S and N ( for 115V 2014 models)

*Vs is the voltage between 2 and 3 ( for 2015 models)

4
 Remark:
Use a multimeter to test the DC voltage
between 2 port and 3 port of outdoor unit.
The red pin of multimeter connects with 2
port while the black pin is for 3 port.

When AC is normal running, the voltage

will move alternately between -50V to
50V.

If the outdoor unit has malfunction, the

voltage will move alternately with positive
value.

While if the indoor unit has malfunction,

the voltage will be a certain value.

Remark:
Use a multimeter to test the resistance
of the reactor which does not connect
with capacitor.
The normal value should be around zero
ohm. Otherwise, the reactor must have
malfunction and need to be replaced.

30

5
9.3.3 Zero crossing detection error diagnosis and solution (E2)
Error Code E2

Malfunction decision When PCB does not receive zero crossing signal feedback for 4
conditions minutes or the zero crossing signal time interval is abnormal.
Supposed causes ● Connection mistake
● PCB faulty
Trouble shooting:
Check if the connections and Correct the connections. Turn on the
No
power supply is normal? unit when the power supply is good.

Yes

Indoor main PCB is

defective. Replace indoor
main PCB.

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9.3.4 Fan speed has been out of control diagnosis and solution(E3)
Error Code E3

Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time,
conditions the unit will stop and the LED will display the failure.
Supposed causes ● Wiring mistake
● Fan ass’y faulty
● Fan motor faulty
● PCB faulty
Trouble shooting:

Power off, then restart the

No The unit operates normally.
unit 2 minutes later

Yes

Shut off the power supply, Find out the cause and have
No
Rotate the fan by hand. it solved

Yes

Check the wiring of fan Correct the connections.

No
motor

Yes

Measure the voltage for the

fan motor from the main No Replace the main PCB
PCB

Yes

Replace the fan motor No

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Index 1:
1:Indoor or Outdoor DC Fan Motor(control chip is in fan motor)

Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor

connector. If the value of the voltage is not in the range showing in below table, the PCB must has

problems and need to be replaced.

DC motor voltage input and output(voltage: 220-240V~)

NO. Color Signal Voltage
1 Red Vs/Vm 280V~380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 14-17.5V
5 Yellow Vsp 0~5.6V
6 Blue FG 14-17.5V

DC motor voltage input and output(voltage :115V~)

NO. Color Signal Voltage
1 Red Vs/Vm 140V~190V
2 --- --- ---
3 Black GND 0V
4 White Vcc 14-17.5V
5 Yellow Vsp 0~5.6V
6 Blue FG 14-17.5V

2. Outdoor DC Fan Motor (control chip is in outdoor PCB)

Power on ,and check if the fan can run normally, if the fan can run normally, the PCB must has

problems and need to be replaced, If the fan can’t run normally, measure the resistance of each two

pins. If the resistance is not equal to each other, the fan motor must have problems and need to be

replaced, otherwise the PCB must has problems and need to be replaced.

3. Indoor AC Fan Motor

Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds,

measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power

supply)or 50V(115V power supply), the PCB must has problems and need to be replaced.

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9.3.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)
Error Code E4/E5/F1/F2/F3

Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V,
conditions the LED will display the failure.
Supposed causes ● Wiring mistake
● Sensor faulty
Trouble shooting: ● PCB faulty

Check the connection

between temperature No Correct the connection
sensor and PCB.

Yes

Measure the resistance

value of the sensor No Repalce the sensor

Yes

Replace indoor or outdoor

main PCB

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9.3.6 Refrigerant Leakage Detection diagnosis and solution(EC)
Error Code EC

Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts
conditions running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2
＜Tcool－2°C(Tcool－35.6°F) does not keep continuous 4
seconds and this situation happens 3 times, the display area will
show “EC” and AC will turn off.

Supposed causes ● T2 sensor faulty

● Indoor PCB faulty
● System problems, such as leakage or blocking.
Trouble shooting:

Power off, then restart the

unit 2 minutes later.

Yes

Check cool air blowing out

Yes Check if T2 sensor
from indoor air outlet

No Yes

Check leakage of system Replace indoor PCB.

No Yes
Repair the leakage and
recharge the refrigerant.
check blockIng of system and
clear the blocking

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9.3.6 Overload current protection diagnosis and solution(F0)
Error Code F0

Malfunction decision An abnormal current rise is detected by checking the specified

conditions current detection circuit.
Supposed causes ● Power supply problems.
● System blockage
● PCB faulty
● Wiring mistake
● Compressor malfunction

Check the power supply No Stop the unit

Yes

Check the blockage of system No Clear the blockage

Yes

Check the compressor

No Replace the compressor
resistance values

Yes

Check the connections and Correct the connections or

No
wires replace the wires.

Yes

Check the reactor No Replace outdoor main PCB

Yes

Replace the outdoor unit

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9.3.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)
Error Code P0

Malfunction decision When the voltage signal that IPM send to compressor drive chip
conditions is abnormal, the display LED will show “P0” and AC will turn off.
Supposed causes ● Wiring mistake
● IPM malfunction
● Outdoor fan ass’y faulty
● Compressor malfunction
● Outdoor PCB faulty
Trouble shooting:

Check the wiring between main PCB Correct the connection or replace
Yes
and compressor the wires and connectors.

No

Check the IPM No Replace the IPM board or replace

the main PCB

Yes

Please refer to the solution of 【Fan

Check the outdoor fan and the
No Speed Has Been Out Of Control】
outdoor unit ventilation
malfunction

Yes

Check the compressor resistance

No Replace the compressor.
values

Yes

Replace the outdoor main PCB

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For example:

Note: The photos below are only for reference, it’s may be not same totally with the ones on your
side.

P-U

P-V

13
 P-W

N-U

14
 N-V

N-W

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9.3.8 Over voltage or too low voltage protection diagnosis and solution(P1)
Error Code P1

Malfunction decision An abnormal voltage rise or drop is detected by checking the

conditions specified voltage detection circuit.
Supposed causes ● Power supply problems.
● System leakage or block
● PCB faulty
Trouble shooting:

Check the power supply No Stop the unit

Yes

Check the connections and Correct the connections or

No
wires replace the wires.

Yes

Check the voltage between P

No Replace the IPM board
and N

Yes

Check the reactor No Replace outdoor main PCB

Yes

Replace the reactor

Remark:
Measure the DC voltage
between P and N port. The
normal value should be
around 310V.

P N

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9.3.9 High temperature protection of compressor top diagnosis and solution(P2)
Error Code P2

Malfunction decision If the sampling voltage is not 5V, the LED will display the failure.
conditions
Supposed causes ● Power supply problems.
● System leakage or block
● PCB faulty
Trouble shooting:

Check the air flow system Clear up the air inlet and outlet or the heat
Yes
of indoor and outdoor units exchanger of indoor and outdoor units.

No

Power off, then restart the unit 10

minutes later

Yes

Check if the temperature Check the overload

No No Correct the connection.
of compressor protector

Yes
Yes

Measure the resistance

between the two ports of No Replace the OLP.
Check refrigerant system the OLP. Is it zero?

Yes

Yes Replace the outdoor control PCB.

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9.3.10 Inverter compressor drive error diagnosis and solution(P4)
Error Code P4

Malfunction decision An abnormal inverter compressor drive is detected by a special

conditions detection circuit, including communication signal detection,
voltage detection, compressor rotation speed signal detection
and so on.
Supposed causes ● Wiring mistake
● IPM malfunction
● Outdoor fan ass’y faulty
● Compressor malfunction
● Outdoor PCB faulty
Trouble shooting:

Check the wiring between main PCB Correct the connection or replace
Yes
and compressor the wires and connectors.

No

Check the IPM No Replace the IPM board or replace

the main PCB

Yes

Please refer to the solution of 【Fan

Check the outdoor fan and the
No Speed Has Been Out Of Control】
outdoor unit ventilation
malfunction

Yes

Check the compressor resistance

No Replace the compressor.
values

Yes

Replace the outdoor main PCB

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Main parts check
1. Temperature sensor checking
Disconnect the temperature sensor from PCB, measure the resistance value with a tester.

Temperature sensors.
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(T5) sensor.
Measure the resistance value of each winding by using the multi-meter.

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 The Klimaire logo is a registered Trademark of Klimaire Products Inc.
Copyright 2016 Klimaire Products Inc.

2190 NW 89 Place, Doral, FL 33172 - USA

Tel: (305)593-8358 Fax (305) 675-2212
www.klimaire.com sales@klimaire.com

The design and specifications are subject to change without prior notice for product
improvement. Consult with the sales agency or manufacturer for details.