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Trouble shooting
Turn the machine’s wall switch off and on again.
Start a program.
Error code returns
No error code
Check voltage between terminals 1 and 2 in
PBC connector X302 on motor control unit. The
voltage should be 120/230 V when door is
closed and locked.
Voltage wrong
Voltage correct
Check voltage between terminals 5 and 6 on
PCB connector X71 on program control unit
PCB. The voltage should be 120/230 V when the
door is closed and locked.
Voltage wrong
Voltage correct
Error codes which may arise on the control panel display
Error code/symptoms
Fault-finding
33E
Motor control unit receiving
start command from program
control unit without first
receiving lock acknowled-
gement signal. Motor control
unit receiving circuitry for lock
acknowledgement signal is
not faulty.
1
X71
6
X78
2316
3333
X302
Transient fault. No action
required.
Faulty wiring between
program control unit PCB and
motor control unit. Check
wiring and replace if
necessary.
Faulty signal detection on
motor control unit. Replace
motor control unit.
Cause/Action
Faulty output signal on
program control unit PCB.
Replace PCB.
120/230 V
120/230 V