User's Manual

NDA-24300 CHAPTER 5
Page 375
Issue 1
FAULT REPAIR PROCEDURES
9.2 Fan Unit Fault
Set the PWR SW key on the PZ-M369 to the ON position.
When the fan spins
Set PWR SW key to AUTO position, and short the thermal relay of the thermal
unit.
If the fan does not
operate
Check the connector cable between
the FANU and the thermal unit.
If the fan operates Replace thermal relay with a spare.
Disconnect the fan
connector of the cable for
the thermal unit.
Replace thermal relay with
a spare.
Connect the fan connector.
If the fan does not operate
Check the voltage (DC -48 V) at connectors FC0 through FC2.
If the voltage is less
than -48 V
Check the connector cable (fan con-
nector) between the FANU and the
PIM.
If the voltage is -48 V Replace the fan with a spare. Refer to
Section 4., Fan Unit Replacement, in
Chapter 4.
After the fault is corrected, set PWR SW key to the AUTO position. If the fans are to continue operating
constantly, set PWR SW key to the ON position.
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