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Error code reference
Polar Refrigerator Error Codes
23 error codes documented with diagnostic procedures.
Have your model number? Get codes specific to your unit.
AC HEAC heater faultAC rEAC heater relay on the main control board (power board) is stuck closed (N7LX/N8LX…dc HEDC heater faultdc rEDC heater relay (K1 on the DC Board) contacts are stuck closed (N7LX/N8LX models).FL --A flame is sensed at the burner when there should be none present; gas valve is…Flash 1AC heater faultFlash 10Communications between the user interface (controls) and the main control board (power…Flash 2Internal control fault detected by the main control board (power board).Flash 3On the main control board (power board), the limit circuit is open.Flash 4The AC heater relay on the main control board (power board) is stuck closed.Flash 5A flame is sensed at the burner when there should be none present; gas valve is…Flash 8The DC input voltage to the refrigerator is too low.Flash 9The DC input voltage to the refrigerator is too high.HI dcDC input voltage to the refrigerator is too high (N7LX/N8LX models).Lo dCDC input voltage to the refrigerator is too low; all modes are inhibited (N7LX/N8LX…Lo dc (alarm)DC input voltage to the refrigerator is too low; either GAS MODE or DC MODE (3-way), or…no ACAC voltage is not available to the refrigerator (N7LX/N8LX models).no dtCommunications between the user interface (controls) and the main control board (power…no FLThe burner did not ignite or re-ignite; no flame sensed at burner when there should be…oP LIOn the main control board (power board), the limit circuit is open (N7LX/N8LX models).Solid RedThe refrigerator tried to operate on the selected energy source(s) with no success; no…SrInternal fault detected by the main control board (power board); can be displayed in any…Thermistor FaultThe thermistor has been sensed as inoperable; temperature is being controlled via backup…
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