ZF Marine ClearCommand, Manual, Page: 91 / 104

TROUBLESHOOTING
Page 5
B) If the voltage tested good, the circuit board needs repair or a
Circuit Board Kit needs to be installed.
1.7 SYMPTOM - T
HE
C
ONTROL
H
EAD RED INDICATOR LIGHT DOES NOT
LIGHT WHEN IN COMMAND
,
BUT EVERYTHING ELSE WORKS
PERFECTLY
.
Cause :
A)Incorrectly wired eight-conductor cable.
B) Defective red indicator light
Remedy :
A)Verify brown wire connection to Terminal 2 of the Processor
and the Control Head.
B) Measure the DC voltage between Terminals 2 and 3 at the Con-
trol Head. The reading will be 1.00 to 2.00 volts in normal
operation. A measurement of 4.00 volts means the indicator
light is OPEN. Replace the Control Head or install a Control
Head Repair Kit.
1.8 SYMPTOM - N
O TONES OR LIGHTED INDICATOR LIGHTS AT THE
C
ONTROL
H
EAD
,
AND NO LIGHTED INDICATOR LIGHTS ON THE
P
ROCESSOR CIRCUIT BOARD
.
Cause :
A)No power to the Processor.
B) Polarity of the battery voltage reversed.
C) Fuse on the Processor circuit board blown.
Remedy :
A)Verify the power source to the Processor.
B) Connect the red wire to the terminal labeled ‘+ ‘ and the black
wire to the terminal labeled ‘ - ‘.
C) Measure the battery voltage at the Processor. It is MANDA-
TORY to correct power source if voltage can exceed 40 volts
under any condition. Replace the fuse with the spare, which is
taped to the relay on the Processor circuit board. If the fuse