3-32 Phaser 4500/4510 Service Manual
Error Messages and Codes
8 Turn the power ON.
Does fan error occur?
Replace the
HVPS/engine
logic board
(page 8-73).
Problem solved.
9 Measure the voltage across P/J27-19
<=> P/J27-18.
Does the voltage measure 24 VDC?
(12 VDC when low-speed)
Go to step 10. Replace the
LVPS
(page 8-62)
then go to step
8.
10 Measure the voltage across P/J27-18
<=> P/J27-17.
Does the voltage measure 0.82 VDC
or higher?
Go to step 11. Replace the
HVPS/engine
logic board
(page 8-73).
11 Replace the Sub Fan (page 8-36)
Does the fan error occur when the
power is turned ON?
Go to step 12. Problem solved.
12 Replace the LVPS.
Does the fan error occur when the
power is turned ON?
Replace the
HVPS/engine
logic board
(page 8-73).
Problem solved.
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No
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