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3.3 Trouble Shooting
3
3.3.10
P1R Stirring Valve/Replenishment Cartridge Washing Valve
Diagnostics
Operate valve on Menu 0642
“I/O Check”. Operating sound heard?
Heard
Not heard
No
Not solved
Stirring, cartridge washing hose
clogged or bent?
Repair hose clogging and bending.
Yes
Is the harness between the valve (S728/S729/
S730/S731) and PDB8 on the PDB23 circuit board
is poorly connected or broken?
Connect harness correctly,
repair or replace it.
Yes
Replace valve (S728/S729/S730/S731).
Solved?
Solved
No
END
Replace the PDB23 circuit board.
P1R cartridge washing valve:
S728
P2RA cartridge washing valve: S729
P2RB cartridge washing valve: S730
P1R stirring valve:
S731
To “3.3.9 Rack Auto Cleaning
System Diagnostics”