Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

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[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
BS_07_E chapter 7 -
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7-7-4 Error Code [5111, 5113, 5132, 5135]
1. Error code definition
5111 - 5113
Temperature sensor fault (Hydro unit) (TH11, TH13)
5132 - 5135
Temperature sensor fault (Hydro unit) (TH32, TH35)
2. Error definition and error detection method

If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11, TH13, TH32, TH35) is detected
during operation, the unit comes to an abnormal stop, and an error code “5111,” “5113,” “5132,” “5135” 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
<Reference>
7-7-5 Error Code [5120]
1. Error code definition
DCL temperature sensor circuit fault (Detail code 01)(outdoor unit)
2. Error definition and error detection method
When an open phase or a short circuit of the temperature sensor is detected immediately before inverter startup or during
operation (applicable to INV37YC only)
3. Cause, check method and remedy
INV37YC
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
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.
Short detection Open detection
TH11 110°C [230°F] and above (0.4k Ω ) -40°C [-40°F] and below (130k Ω )
TH13 110°C [230°F] and above (0.4k Ω ) -40°C [-40°F] and below (130k Ω )
TH32 110°C [230°F] and above (0.4k Ω ) -40°C [-40°F] and below (130k Ω )
TH35 110°C [230°F] and above (0.4k Ω ) -40°C [-40°F] and below (130k Ω )
Cause Check method and remedy
(1) Contact failure Check the connector (CNTH) on the inverter board for proper
connection.
(2) DCL temperature sensor Disconnect the connector (CNTH), check the resistance val-
ue of the DCL temperature sensor.
Replace the DCL if the resistance is as follows: 0.5 k Ω or be-
low (short-circuit) or 1963 k Ω or above (open-circuit).
(3) INV board failure If the problem persists after restart operation, replace the in-
verter board.
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