Oki B6500

1 – 14
Chapter 1 Troubleshooting
FIP1.4 Fan Error
Step Check Yes No
Possible causes:
FAN MAIN (PL1.1.14)
FAN SUB (PL8.1.5)
LVPS (PL12.1.5)
HVPS/MCU (PL12.1.19)
1
Checking FAN MAIN for rotation (1).
Does FAN MAIN rotate, when the power is turned ON?
Go to step 2. Go to step 5.
2
Checking FAN SUB for rotation (1).
Does FAN SUB rotate, when the power is turned ON?
Go to step 3. Go to step 9.
3
Checking FAN MAIN for rotation (2).
Does FAN MAIN rotate in high-speed?
Check using Chapter 2 Diagnostic [Fan Motor, High
Speed Test].
Go to step 4. Go to step 5.
4
Checking FAN SUB for rotation (2).
Does FAN SUB rotate in high-speed?
Check using Chapter 2 Diagnostic [Fan Motor, High
Speed Test].
Replace HVPS/
MCU, and watch
FUN SUB for a
while.
(RRP12.10)
Go to step 9.
5
Checking the power to FAN MAIN.
Is FAN MAIN connected correctly, and is the voltage
across P/J24-18(+) and P/J24-17(-), 24 VDC?
(12 VDC, when half-speed)?
Go to step 6. Go to step 7.
6
Checking the FAN ALARM signal (1).
Is the voltage across P/J24-17(+) and P/J24-16(-), 0.82
VDC or more?
Replace FAN
MAIN. (RRP12.6)
Replace HVPS/
MCU. (RRP12.10)
7
Checking after replacing FAN MAIN
Replace the FAN MAIN.
Does FAN Error occur when the power is turned ON?
Go to step 8. End of work
8
Checking after replacing LVPS
Replace the LVPS.
Does FAN Error occur when the power is turned ON?
Replace HVPS/
MCU.
(RRP12.10)
End of work
9
Checking the power to FAN SUB
Is FAN SUB connected correctly, and is the voltage
across P/J27-19(+) and P/J27-18(-), 24 VDC?
(12 VDC, when half-speed)?
Go to step 10. Go to step 11.
10
Checking the FAN ALARM signal
Is the voltage across P/J27-18(+) and P/J27-17(-), 0.82
VDC or more?
Replace FAN
SUB (RRP8.2)
Replace HVPS/
MCU. (RRP12.10)
11
Checking after replacing FAN SUB
Replace the FAN SUB.
Does FAN Error occur when the power is turned ON?
Go to step 12. End of work
12
Checking after replacing LVPS
Replace the LVPS.
Does FAN Error occur when the power is turned ON?
Replace HVPS/
MCU.
(RRP12.10)
End of work