6 Troubleshooting
Troubleshooting by protection code (Outdoor unit)
SMGB0135 rev.0 - 06/2020
76
Protection
code
P106
Stoppage by OH Thermistor High Temperature
• Outdoor unit LED301 blinks 6 times.
• This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm.
Yes
Check whether the OH thermistor is loose or poorly inserted.
Check the OH thermistor for wire breaks and short-circuits.
LD301 blinks 6 times.
An increase of compressor
temperature has been
detected by the OH
thermistor.
Inspect the refrigerating cycle.
(It may be due to a cause such
as refrigerant leakage)
Replace the OH thermistor.
Fix the connection of the
OH thermistor.
In case that inspecting the refrigerating cycle
does not help to solve the problem, replace
the outdoor electrical parts (due to abnormality
in the thermistor detection circuit).
Increase of compressor
temperature
Abnormal
Abnormal
Normal
Normal
Protection
code
P107
Thermistor failure
• Outdoor unit LED301 blinks 7 times.
• This protection code is displayed 3 times before alarm 107 appears at the LCD controller.
No
Yes
LD301 blinks 7 times.
Check for loose or poorly inserted thermistors.
Check the thermistors for wire breaks and short-circuits.
Replace any abnormal
thermistors.
Fix the connection of the
thermistors.
Thermistor abnormality
Abnormal
Abnormal
Normal
Normal
Replace the outdoor electrical
parts (due to abnormality in the
thermistor detection circuit).
Protection
code
P109
Stoppage by transmission error, communication error
• Outdoor unit LED301 blinks 9 times.
• This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm.
Yes
No
Check that the indoor timer lamp
blinks.
Abnormal
Normal
Normal
Blinks 3 times
Blinks 12 times
Check the indoor electrical
parts. (Check the temperature
fuse in the terminal board)
Fix the connection of the F
cable.
Release JW001 and JW002.
Replace the outdoor electrical
parts (due to abnormality in the
communication circuit).
Is JW001 open? Or is the circuit
between JW001 and JW002 short?
JW001 is open or JW001 and JW002 are short
Check the F cable connection (for incomplete insertion,
connection with a too thin cable, erroneous connection
between terminal boards 1, 2 and 3, and other abnormalities).
LD301 blinks 9 times.
Communication error
Protection
code
P110
Power supply voltage error
• Outdoor unit LED301 blinks 10 times.
• This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm.
Yes
LD301 blinks 10 times.
AC voltage between 187 and 253 V
Abnormal
Normal
AC voltage lower than 187 V or greater than 253 V
Power supply voltage error
Check the power supply.
Check for
loose or poorly
inserted reactor.
Check the connection of the
reactor wire. If it is OK, please
replace the reactor.
Is there a voltage of AC 220-230 V
between terminal boards L and N?
Is DC voltage between 264 and 358 V? Refer to
the label on the cover of the electrical parts for the
measuring points.
Replace the outdoor electrical
parts (due to circuit abnormality).
Replace the outdoor electrical
parts (due to abnormality in the
voltage detection circuit).
To Next Page
Loading...
