Xerox Phaser 8400 Service Manual page 115

8400 8500/8550
37,022.40: 37,025.43:
Troubleshooting Procedure for Pressure Pump
Step Questions and Actions
1 1. Run the Pressure Pump Motor test.
2. Did the test pass?
2 1. Check the purge pump assembly wiring.
2. Is the wiring damaged?
8400 8500/8550
37,023.41: 37,026.44
Troubleshooting Procedure for Purge Valve
Step Questions and Actions
1 1. Run the Purge Vent Solenoid test.
2. Did the test pass?
2 1. Check the purge pump assembly wiring.
2. Is the wiring damaged?
Service Manual
8400 PEST Description
Pressure pump motor disconnect. The pressure pump
motor is not drawing the expected power from the supply.
Purge valve disconnect. The purge valve is not drawing the
expected power from the supply.
Yes
Replace the
electronics
module.
Replace the pressure pump motor.
PEST Description
Yes
Go to Step 2.
Replace the defective wiring or the
purge pump.
No
Go to Step 2.
No
Replace the
purge pump.
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