82
Trouble shooting
20E
Interlock signal absent at
motor control unit during
program operation.
Error codes which may arise on the control panel display
Turn the machine’s wall switch off and on again.
Start a program.
Error code returns
No error code
Check the voltage between terminals 1 and 2 at
PCB connector X302 on motor control unit. The
voltage should be 120/230 V when the door is
closed and locked.
Voltage wrong
Voltage correct
Check the 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
Check the input voltage to PCB connector X78
(120/230 V)
Wrong voltage
Voltage correct
3333
1
X71
6
X78
2316
X302
Error code/symptoms
Fault-finding
Cause/Action
Faulty signal detection on
motor control unit. Replace
motor control unit.
Transient fault. No action
required.
Fault in wiring between
program control unit PCB and
motor control unit. Check
wiring and replace if
necessary.
Faulty wiring between
transformer T10 and program
control unit PCB. Check
wiring and replace if
necessary.
Faulty output signal on
program control unit PCB.
Replace PCB.
120/230 V
120/230 V
Summary of Contents for EXSM 230 S
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Page 32: ...32 Mechanical and electrical design Control unit ...
Page 93: ...93 Trouble shooting If machine vibrates excessively A Tighten mounting bolts Fig 101 101 2408 ...
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