Mitsubishi Electric PURY-P120TJMU-A, Service Handbook, Page: 245 / 411

[
IX
Troubleshooting ]
- 236 - HWE0913A GB
1. Error Code
Liquid inlet temperature sensor (TH11) fault (BC controller)
Bypass outlet temperature sensor (TH12) fault (BC controller)
LEV3 outlet temperature sensor (TH15) fault (BC controller)
LEV3 inlet temperature sensor (TH16) fault (BC controller)
2. Error definition and error detection method
Œ
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.
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
5112
5115
5116
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 temperature,
replace the control board.
TH11
TH12
TH15
TH16
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 )
Short detection
110 C [230 F ] and above (0.4 k )
110 C [230 F ] and above (0.4 k )
70 C [158 F ] and above (0.4 k )
110 C [230 F ] and above (0.4 k )