Norcold N611V SERIES Service Manual

Also see for N611V SERIES: Owner's manual

Norcold N611V SERIES Service Manual Manual pdf 16 page image

www.norcold.com/cda16 Refrigerator Service ManualN611v, N811v ModelsFault Codes - cont’d.Continuous 12-Volts:See Fig. 6 on page 17.12VDC is supplied to the refrigerator at Power Board terminals12VDC & GND [A]. This 12VDC travels through the PowerBoard to fuse F1 [B] and then out to P1-6 [C]. Via the greenwire, the 12VDC exits the Power Board and enters the DisplayBoard at P1-1 [D]. The 12VDC travels through the DisplayBoard to one side of the normally open On-Off switch [E]. This12VDC is referred to as the continuous 12-volts because itis always present at the one side of the On-Off switch when12VDC power is applied to the refrigerator.Blank DisplaySwitched 12-Volts:See Fig. 7 on page 17.Pressing the On-Off switch [E] will allow 12VDC to passthrough the On-Off switch and back to the Power Board viathe blue wire [F] connected between the Display Board at P1-3and the Power Board at P2-3. Once the 12VDC reaches thePower Board, a signal is sent out to the coil of relay K3 [G]via the U1 microprocessor. This signal allows the K3 relay toenergize thus closing the normally open contacts [H].Fig. 5A - Thermistor Fig. 5B - Thermistor in IceK3 is a latching relay. Once the relay coil is energized the contacts close and remain closed even when the 12VDC is re-moved, hence the term “latching relay”. With the K3 contacts now closed, 12VDC is passed back to the Display Board via theWhite-Red wire [J] between P1-9 of the Power Board and P1-2 of the Display Board. This 12VDC will remain at P1-2 until thelatching relay is “un-latched”, which will not take place until the On-Off button is depressed again. This 12VDC is termed theswitched 12-volts and is used to power ON the display.NOTEOn-Off Theory of Operation: