Mitsubishi Electric CMB-WM108V-AA Service Handbook page 154

[ VIII Troubleshooting ]
5111,5112,5115,5116
1. Error Code
5111 -
Temperature sensor fault (HBC controller) (TH11~TH16)
5132 -
Temperature sensor fault (HBC controller) (TH32~TH35)
5141 -
Temperature sensor fault (HBC controller) (TH31a~TH31p)
5161 -
Temperature sensor fault (Sub-HBC) (TH31a~TH31p)
5177 -
Temperature sensor fault (Sub-HBC) (TH32~TH33)
2. Error definition and error detection method
If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11 through TH16, TH32 through TH35,
TH31a through TH31p, TH31a through TH31p, TH32, or TH33 ) is detected during operation, the unit comes to an abnormal
stop, and an error code "5111" through "5116," "5132" through "5135," "5141" through "5156," "5161" through "5176," or "5177"
through "5178" appears on the display.
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
(1) Thermistor failure
(2) Pinched lead wire
(3) Torn wire coating
(4) A pin on the male connector is missing or
contact failure
(5) Disconnected wire
(6) Thermistor input circuit failure on the control
board
<Reference>
TH11
TH12
TH13
TH14
TH15
TH16
TH32~TH35
TH31a~TH31p
TH31a~TH31p
TH32~TH33
HWE1708A
5116
5135
5156
5176
5178
Cause
Short detection
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
110°C [230°F] and above (0.4kΩ)
Check method and remedy
Check thermistor resistance.
Check for pinched lead wire.
Check for wire coating.
Check connector.
Check for wire.
Check the intake temperature of the sensor with the LED
monitor.
When the temperature is far different from the actual tem-
perature, replace the control board.
Open detection
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
-40°C [-40°F] and below (130kΩ)
- 145 -
GB