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Error Codes [5111, 5112, 5115, 5116] - Mitsubishi Electric PURY-HP72 Service Handbook

R410a
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[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-5

Error Codes [5111, 5112, 5115, 5116]

1. Error code definition
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
Cause
(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>
HWE13080
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.
Short detection
TH11
110 C [230 F ] and above (0.4 k )
-40 C [ -40 F ] and below (130 k )
TH12
110 C [230 F ] and above (0.4 k )
-40 C [ -40 F ] and below (130 k )
TH15
70 C [158 F ] and above (0.4 k )
-40 C [ -40 F ] and below (130 k )
TH16
110 C [230 F ] and above (0.4 k )
-40 C [ -40 F ] and below (130 k )
- 213 -
Check method and remedy
Open detection
GB

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