Mitsubishi Electric City Multi CMB-WP108V-G, Service Manual

Page: 168 / 301

[
IX
Troubleshooting ]
- 159 - HWE1113B GB
5111,5112,5115,5116
1. Error Code
Temperature sensor fault (HBC controller) (TH11~TH16)
Temperature sensor fault (HBC controller) (TH32~TH37)
Temperature sensor fault (HBC controller) (TH31a~TH31h)
2. Error definition and error detection method
Œ
If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11 through TH16, TH32 through TH37,
or TH31a through TH31h) is detected during operation, the unit comes to an abnormal stop, and an error code "5111" through
"5116," "5132" through "5137," or "5141" through "5148" appears on the display.
Œ
Detection of a short- or open-circuit as described above is suspended during the defrost cycle and for 3 minutes after the
operation mode is changed.
3. Cause, check method and remedy
<Reference>
5111 - 5116
5132 - 5137
5141 - 5148
Cause Check method and remedy
(1) Thermistor failure Check thermistor resistance.
(2) Pinched lead wire Check for pinched lead wire.
(3) Torn wire coating Check for wire coating.
(4) A pin on the male connector is missing or
contact failure Check connector.
(5) Disconnected wire Check for wire.
(6) Thermistor input circuit failure on the control
board Check the intake temperature of the sensor with the LED
monitor.
When the temperature is far different from the actual temper-
ature, replace the control board.
Short detection Open detection
TH11 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH12 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH13 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH14 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH15 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH16 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH32~TH37 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)
TH31a~TH31h 110°C [230°F] and above (0.4k
ȍ
) -40°C [-40°F] and below (130k
ȍ
)