Error Code 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(a) outlet temperature sensor (TH15) fault (BC controller) 5116 LEV3(a) 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 Check method and remedy (1) INV board failure If the problem recurs when the unit is put into operation, replace the compressor or fan INV board. 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 (0.57 k ) 110 C [230 F ] and above (0.57 k ) 110 C [230 F ] and above (0.57 k ) 110 C [230 F ] and above (0.57 k )