Screen 4: Stored Fault History; Screen 5. Stored Fault History; Screen 6. Erasing Fault History; Screen 7. Power Board Inputs - Norcold Polar N7V Service Manual

DIAGNOSTIC MODE - N7LX and N8LX MODELS, cont'd.

SCREEN 4: Stored Fault History

Touch and release the MODE button to bring up screen 4.
Screen 4 Initial view
Screen 4 Second view
This screen displays stored fault history using lighted LED seg-
ments. Refer to illustration below for fault history definitions of the
individual LED segments. If a fault occurred, its assigned fault
history LED segment will be on.
Not used
AC mode selected
but not available

SCREEN 5. Stored Fault History

Touch and release the MODE button to bring up screen 5.
Screen 5 Initial view
Screen 5 Second view
This screen also displays stored fault history using lighted LED
segments. Refer to illustration below for fault history definitions of
the individual LED segments. If a fault occurred, its assigned
fault history LED segment will be on.
Flame present
with gas off
Service required
error has occurred
www.norcold.com
NOR000650A-16
Burner failed to
ignite/reignite
1
2 3 DC voltage low
4
DC voltage high
6
5
AC heater relay
stuck closed
7
AC heater failed
open
NOR000650A-17
Thermistor failure
1
DC heater relay stuck
closed (always current)
2 3
DC heater relay stuck
4
open (no current)
6
5 Not used
7
Not used

SCREEN 6. Erasing Fault History

Touch and release the MODE button to bring up screen 6.
Screen 6 Initial view
Screen 6 Second view
Screen 6 Third view
Screen 6 Fourth view
This screen provides a way to erase fault history from memory. To
erase the fault history:
■ Touch and hold the Temperature Set button five (5) seconds
until "CL" shows on the screen.
■ Once "CL" is displayed, release the Temperature Set button.
■ Touch and hold Temperature Set button five (5) seconds until
"Er" is displayed again. At this point, the fault history has been
cleared on both Screen 4 and Screen 5.

SCREEN 7. Power Board Inputs

Touch and release the MODE button to bring up screen 7.
Screen 7 Initial view
Screen 7 Second view
This screen displays "live" power board inputs using lighted LED
segments. Refer to illustration below for "live" input definitions of
the individual LED segments. If a power board input is active or
"live," its assigned input LED segment will be on.
Flame is sensed.
Not used
51
Not used
1
2 3 Thermister is sensed in range
4
Not used
6
5
Not used
7
Not used
SERVICE MANUAL
NOR000650A-18
NOR000650A-20