Hitachi YUTAMPO Series Service Manual page 84

6 Troubleshooting
Troubleshooting by protection code (Outdoor unit)
Protection P106
code
• Outdoor unit LED301 blinks 6 times.
• This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm.
Yes
LD301 blinks 6 times.
Increase of compressor
temperature
Protection P107
code
• Outdoor unit LED301 blinks 7 times.
• This protection code is displayed 3 times before alarm 107 appears at the LCD controller.
Yes
LD301 blinks 7 times.
Thermistor abnormality
No
Protection P109
code
• Outdoor unit LED301 blinks 9 times.
• This protection code is displayed continuously until the abnormal situation ends, without leading to an alarm.
Yes
LD301 blinks 9 times.
Communication error
No
Protection P110
code
• 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.
Power supply voltage error
76 SMGB0135 rev.0 - 06/2020
Stoppage by OH Thermistor High Temperature
An increase of compressor Check whether the OH thermistor is loose or poorly inserted.
temperature has been
detected by the OH
thermistor.
Check the OH thermistor for wire breaks and short-circuits.
Normal
Check for loose or poorly inserted thermistors.
Normal
Check the thermistors for wire breaks and short-circuits.
Normal
Stoppage by transmission error, communication error
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).
Normal
Blinks 3 times
Check that the indoor timer lamp
blinks.
Blinks 12 times
JW001 is open or JW001 and JW002 are short
Is JW001 open? Or is the circuit
between JW001 and JW002 short?
Normal
AC voltage lower than 187 V or greater than 253 V
Is there a voltage of AC 220-230 V
between terminal boards L and N?
AC voltage between 187 and 253 V
Is DC voltage between 264 and 358 V? Refer to
the label on the cover of the electrical parts for the
measuring points.
Normal
Abnormal
Normal
Abnormal
Inspect the refrigerating cycle.
(It may be due to a cause such
as refrigerant leakage)
Thermistor failure
Abnormal
Abnormal
Abnormal
Power supply voltage error
Abnormal
Check for
loose or poorly
inserted reactor.
Fix the connection of the
OH thermistor.
Replace 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).
Fix the connection of the
thermistors.
Replace any abnormal
thermistors.
Replace the outdoor electrical
parts (due to abnormality in the
thermistor detection circuit).
Fix the connection of the F
cable.
Check the indoor electrical
parts. (Check the temperature
fuse in the terminal board)
Release JW001 and JW002.
Replace the outdoor electrical
parts (due to abnormality in the
communication circuit).
Check the power supply.
Check the connection of the
reactor wire. If it is OK, please
replace the reactor.
Replace the outdoor electrical
parts (due to circuit abnormality).
Replace the outdoor electrical
parts (due to abnormality in the
voltage detection circuit).