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3.3 Trouble Shooting
Remove circulation filter from sub-tank.
Is solution surface inside sub-tank swirling?
Is the harness between the circulation
pump and the PDB23 circuit board
poorly connected or broken?
Replace circulation pump.
Solved?
Connect harness correctly,
repair or replace it.
Replace the PDB23 circuit board.
Correct clogging.
NO
Yes
Solved
YES
No
Not solved
END
P1:
PU700 to PDB4
P2:
PU701 to PDB4
PS1: PU702 to PDB4
PS2: PU703 to PDB4
PS3: PU704 to PDB4
PS4: PU705 to PDB4
Replace circulation filter.
Solved?
Solved
END
Pipes or nozzles clogged?
Yes
Not solved
No
<Processing solution circulation>
To “Safety thermostat”,
“Heater cooling fan”