HWH 400 Series, Руководство по обслуживанию

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REPAIR STEPS
SOLUTION DIAGRAMS
PROBLEM
MI91.2130
11JUN98
REFER TO MP85.3455
REFER TO MI91.1065
b. The system ON
light will not come
on. Leveling lights
will come on and
the system func-
tions. The bulb may be burnt out. Remove the lens and use the clip under
the lens to remove the bulb. If a new bulb does not fix the problem,
the switch needs to be repaired.
c. Three yellow level-
ing lights or oppos-
ing leveling lights
come on. (Right
front and left rear
or left front and
right rear.) Unplug the 5 wire sensing unit plug from the control panel. Use a test
light connected to ground to test the panel. Touch pins 4, 5, 6 and 7.
The appropriate light for that pin should come on. Only one light at a
time should come on. If the lights do not work properly, replace the
panel. If the panel works properly, replace the sensing unit.
REFER TO MP85.3460
If the fuse is blown, unplug the 11 pin harness, pins 14-24. Replace
the fuse and turn the master switch on again. If the fuse blows, check
that the wire connected to pin #9 is not shorted to ground. If pin #9 is
ok, replace the control panel.
If the fuse does not blow, continue with the repair. If the fuse blows when
the 11 pin harness is plugged in, there is a short in the master relay
circuit. Use the master and pump relay connection diagram for the
following tests.
Unplug connection A. Replace the fuse and turn the master switch on.
If the fuse blows, the red wire in the control harness is shorted to ground.
If the fuse does not blow, unplug connection B then plug in connection
A. If the fuse blows, replace the fuse board. If the fuse does not blow,
disconnect the red wire from Terminal 2 of the master relay. Plug in
connection B. With the panel ON if the fuse blows, the red wire in the
pump harness is shorted to ground. If the fuse does not blow, replace
the master relay.
If the fuse does not blow, plug the 11 pin harness back into the panel.
REFER TO MP85.3455
Part 3a continued