Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 249

[ IX Troubleshooting ]
Error Code
1102 Abnormal dis-
charge air tem-
perature
Error definition and error
detection method
1. If the discharge tem- (1) Gas leak, gas shortage
perature of 120°C
[248°F] or more is de-
(2) Overload operation
tected during the
above operation (the
first detection), the
outdoor unit stops
(3) LEV failure on the indoor
once, turns to anti-re-
start mode for 3 min-
(4) LEV1 failure on the out-
utes, and restarts after
3 minutes automati-
cally.
2. If the discharge tem-
perature of 120°C
(5) Closed ball valve
[248°F] or more is de-
tected again (the sec-
ond detection) within
(6) Outdoor fan (including fan
30 minutes after the
second stop of the
outdoor unit described
above, the mode will
be changed to 3-
minute restart mode,
then the outdoor unit
(7) Gas leak between low and
will restart in 3 min-
utes.
3. If the discharge tem-
perature of 120°C
[248°F] or more is de-
tected (the third detec-
(8) Thermistor failure
tion) within 30 minutes
after the stop of the
(9) Input circuit failure on the
outdoor unit described
above (regardless of
the first or the second
stop), the outdoor unit
will make an error
stop, and the error
code "1102" will be
displayed.
4. If the discharge tem-
perature of 120°C
[248°F] or more is de-
tected more than 30
minutes after the pre-
vious stop of the out-
door unit, the
detection is regarded
as the first detection,
and the operation de-
scribed in step 1
above will start.
5. For 30 minutes after
the stop (the first stop
or the second stop) of
the outdoor unit, pre-
liminary errors will be
displayed on the LED
display.
- 240 -
Cause
Refer to the page on refrigerant
amount evaluation.
Check operating conditions and op-
eration status of indoor/outdoor
units.
Perform a cooling or heating opera-
unit tion and check the operation.
Cooling : LEV on the indoor unit
door unit LEV1
Heating : LEV on the indoor unit
Refer to the page on troubleshooting
LEV.
Confirm that the ball valve is fully
open.
Check the fan on the outdoor unit.
parts) failure, motor failure, Refer to the section on troubleshoot-
or fan controller malfunc- ing the outdoor unit fan.
tion
Rise in discharge temp. by
low pressure drawing for
(3) - (6).
Perform a cooling or heating opera-
high pressures tion and check the operation.
(4-way valve failure, Com-
pressor failur, Solenoid
valve (SV1) failure)
Check the thermistor resistor.
(TH1,TH11,TH12)
Check the inlet air temperature on
controller board thermistor the LED monitor.
Check method and remedy