26
The upper
lamp of
OPERATION
INDICATOR
lamp
(Indoor unit)
Abnormal point
(Failure mode/protection)
LED indication
(Outdoor P.C. board)
Condition Remedy
Indoor/outdoor
unit failure
mode recall
function
Outdoor unit
failure mode
recall function
11-time
fl
ash
2.5 seconds
OFF
DC voltage
8-time
fl
ash
2.5 seconds OFF
DC voltage of inverter cannot be
detected normally.
• Refer to 11-5. "How
to check inverter/
compressor".
—
○
Each phase current of
compressor
9-time
fl
ash
2.5 seconds OFF
Each phase current of compressor
cannot be detected normally.
14-time
fl
ash
or more
2.5 seconds
OFF
Stop valve (Closed valve)
14-time
fl
ash
2.5 seconds OFF
Closed valve is detected by
compressor current.
• Check stop valve.
○
○
4-way valve/
Pipe temperature
16-time
fl
ash
2.5 seconds OFF
The 4-way valve does not work
properly.
The indoor coil thermistor detects an
abnormal temperature.
• Check 4-way valve.
• Replace inverter P.C.
board.
Outdoor refrigerant system
abnormality
17-time
fl
ash
2.5 seconds OFF
A closed valve and air trapped in the
refrigerant circuit are detected based
on the temperature sensed by the
indoor and outdoor thermistors and the
current of the compressor.
• Check for a gas leak
in a connecting piping
etc.
• Check the stop valve.
• Refer to 11-5.
“Check of outdoor
refrigerant circuit”.
○
○
NOTE:
Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (11-3.).
OBH751
