188
Troubleshooting
Indication on Micro-Computer Input/Output
Thermo Temp. of
Remote Control
Switch
11
Micro-Computer
Input/Output in
Outdoor Unit
13
14 Cause of Stoppage
15
Abnormality
Occurrence Times
Instantaneous Power
Failure Occurrence
Times in Indoor Unit
16
Abnormality
Occurrence Times
on Inverter
18
Transmission Error
Occurrence Times
between Remote
Control Switch and
Indoor Unit
17
19 Louver Sensor
Micro-Computer
Input/Output in
Indoor Unit
12
Heating Thermo-ON
Cooling Thermo-ON
Dark
Alarm
H2
52H
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Indication of Unit Stoppage Cause
Abnormality Occurrence Counter
Indication of Automatic Louver Condition
212
211
X1
20A1
CH1
CH2
20CHG
20F2
20B
X2
20F1
20C
00 Operation OFF, Power OFF
01 Thermo-OFF (NOTE 1), Activating Float Switch
02 Alarm (NOTE 2)
03 Freeze Protection, Overheating Protection
05 Instantaneous Power Failure at Outdoor Unit, Reset
(NOTE 3)
06 Instantaneous Power Failure at Indoor Unit, Reset (NOTE 4)
07 Stoppage of Cooling Operation due to Low Outdoor Air
Temperature, Stoppage of Heating Operation due to High Outdoor
Air Temperature
09 Reversing Valve Changeover, Stoppage
10 Demand, Enforced Stoppage
11 Retry due to Pressure Ratio Decrease
12 Retry due to Low Pressure Increase
13 Retry due to High Pressure Increase
14 Retry due to Abnormal Current of Constant Compressor
15 Retry due to Abnormal High Temperature of Discharge Gas,
Excessively Low Suction Pressure
16 Retry due to Decrease of Discharge Gas Superheat
17 Retry due to Inverter Abnormality
18 Retry due to Voltage Decrease, Other Retry due to Inverter
19 Expansion Valve Opening Change Protection
21 Thermo-OFF by Oil Return Control
22 Hot Start of Outdoor Unit
26 Retry due to High Pressure Decrease
28 Cold Draft Control
30 Thermo-OFF due to Compressor Forced Stop
32 Retry due to Excessive Outdoor Unit Number
(NOTE 1) Explanation of Term,
Thermo-ON: A condition that an indoor unit is
requesting compressor to operate.
Thermo-OFF: A condition that an indoor unit is not
requesting compressor to operate.
(NOTE 2) Even if stoppage is caused by “Alarm”, “02” is not
always indicated.
(NOTE 3) If transmission between the inverter printed circuit board and
the control printed circuit board is not performed during 30
seconds, the outdoor unit is stopped.
In this case, stoppage is d1-05 cause and the alarm
code “04” may be indicated.
(NOTE 4) If transmission between the indoor unit and the outdoor unit
is not performed during 3 minutes, indoor units are stopped.
In this case, stoppage is d1-06 cause and the alarm
code “03” may be indicated.
Countable up to 99.
Over 99 times, “99” is always indicated.
(NOTE 1) If a transmitting error continues for 3 minutes, one is
added to the occurrence times.
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