167
TROUBLESHOOTING
Error frequen-
cy until error
display
Display
Treatment
Method of diagnosis / repair
Possible major causes Diagnosis / Repair
※ 1 ※ 2
1 Error C, E B 1. Connector connection failure
2. Outdoor heat exchanger vapor tempera-
ture sensor failure
3. Harness disconnection
1. Check connector connection
2. Inspect outdoor heat exchanger vapor
pipe temperature sensor (Refer to
P229, 53)Check for Readings of the
Outdoor Temperature Sensors)
1 Error C, E B 1. Outdoor heat exchanger vapor tempera-
ture sensor failure
2. Harness short circuit
1 Error C, E B 1. Connector connection failure
2. Sub heat exchanger liquid temperature
sensor failure
3. Harness disconnection
1. Check connector connection
2. Inspect sub heat exchanger liquid tem-
perature sensor (Refer to P229,
53)Check for Readings of the Out-
door Temperature Sensors)
1 Error C, E B 1. Sub heat exchanger liquid temperature
sensor failure
2. Harness short circuit
1 Error C, E B 1. Connector connection failure
2. Outdoor liquid pipe temperature sensor
failure
3. Harness disconnection
1. Check connector connection
2. Inspect outdoor liquid pipe temperature
sensor (Refer to P229, 53)Check for
Readings of the Outdoor Tempera-
ture Sensors)
1 Error C, E B 1. Outdoor liquid pipe temperature sensor
failure
2. Harness short circuit
2/15 minutes Error B B 1. Igniter operation failure
2. Igniter power supply operation failure
Refer to P202, 12)Inspect Igniter, etc.
1ErrorBB
1ErrorBB
1 Error B N Transformer failure Refer to P199, 6)Inspect Starter Trans-
former
4 sets Error C B 1. Intake and exhaust air system failure
2. Ignition system failure
3. Compression system failure
4. Noise or other causes
5. Overload in cranking (Cold district only)
1. Refer to P184, 2)Engine will not Start
2. Refer to P176, [NOTE) Start prohibi-
tion control after "LF" (start failure)
is displayed]
4/15 minutes Error B B 1. Inadequate engine output.
2. Stepping motor operation failure, etc.
Refer to P185, 3)Engine Starts But Stalls
1 Error B N Output failure of electromagnetic gas valve Inspect or replace outdoor control PCB
2/15 minutes Error B, E B 1. Starter relay melting abnormality
2. Outdoor control PCB failure
1. Refer to P200, 7)Operation Check of
Relay
2. Inspect or replace outdoor control PCB
2 in a row Error C B 1. Connector of engine speed sensor
contact failure
2. Engine speed sensor failure
3. Harness of engine speed sensor discon-
nection
4. Starter motor failure
5. Transformer failure
6. Relay failure
Refer to P184, 2)Engine will not Start