Wiring Schematic; Self-Test Diagnostics; Fig. 6 - Dc Power Wire Connection; Fig. 6 - Wiring Schematic - Norcold DC558 Service Manual

Electrical Connections, cont'd.
• Each DC power supply lead is attached to the correct polar-
ity wire of the refrigerator power supply.
• The chassis or the vehicle frame is not used as one of the
conductors.
ART 02507

Fig. 6 - DC Power Wire Connection

• The DC power supply wires including the fuses are routed
directly from the battery to the refrigerator.
• The wire connections are tight and free of corrosion.
■ If any of these items are not correct, a voltage will occur and
decrease the cooling performance of the refrigerator.
CAUTION: Disconnect the positive (+) DC power supply wire
!
from the battery before you do a "fast charge" of the battery. Failure to
disconnect the positive (+) power supply wire from the battery during
a "fast charge" can cause damage to the refrigerator or to other DC
appliances.
DC558

Wiring Schematic

DC
C
99
224

Fig. 6 - Wiring Schematic

No. Description
A DC Control Module
B Main DC Switch - 20 Amp (not supplied)
C Thermostat
D Ventilation Fan (2x)
F1 15 Amp Fuse (not supplied)

Self-Test Diagnostics

The unit's control module is equipped with a "Self-Test Diagnostic"
function which can be read using a light emitting diode (LED).
To access indicated errors in the control module you will need the
following:
■ One 10 mA LED with wire leads (A)
■ Two 1/4 inch push-on female connectors (B1) and (B2)
■ One 1/4 inch adapter (C) with 1 female to 2 male
connections. (See Fig. 7)
Note:

Fig. 7 - LED and Connectors

8
F1
B
D
Do not leave jumpers in place for normal operation.
B1
B2
A
A
C
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