Mitsubishi Electric PURY-RP200 Service Handbook page 187

[ IX Troubleshooting ]
1. Error Code
5110
Heatsink temperature sensor (THHS) fault (Detail code 01)
2. Error definition and error detection method
When a short or an open of THHS is detected just before or during the inverter operation.
3. Cause, check method and remedy
Cause
(1) INV board failure
Refer to section -7- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 250)
1. Error Code
5111
Liquid inlet temperature sensor (TH11) fault (BC controller)
5112
Bypass outlet temperature sensor (TH12) fault (BC controller)
5115
LEV3 outlet temperature sensor (TH15) fault (BC controller)
5116
LEV3 inlet temperature sensor (TH16) fault (BC controller)
2. Error definition and error detection method
If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11, TH12, TH15, or TH16) is detected
during operation, the unit makes an error stop, and an error code "5111," "5112," "5115," or "5116" 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>
HWE10140
If the problem recurs when the unit is put into operation, replace the INV board.
Cause
Short detection
TH11 110 C [230 F ] and above (0.4 k )
TH12 110 C [230 F ] and above (0.4 k )
TH15 70 C [158 F ] and above (0.4 k )
TH16 110 C [230 F ] and above (0.4 k )
Check method and remedy
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 temperature,
replace the control board.
Open detection
-40 C [ -40 F ] and below (130 k )
-40 C [ -40 F ] and below (130 k )
-40 C [ -40 F ] and below (130 k )
-40 C [ -40 F ] and below (130 k )
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