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) - Mitsubishi Electric PURY-(E)P200 Service Handbook

[ IX Troubleshooting ]
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>
HWE07130
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 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 temper-
ature, 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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