Wascomat EX677 - Page 129

129
Troubleshooting
Error code 35, MOTOR SHORT CIRCUIT
This error code is generated by the motor control. The motor control reads
the power consumption of the motor continuously. If the current for some
reasongetstoohigh(=exceedsacertainlimit),themotorcontrolwillcut
thecurrenttothemotor.Afterthemotorhasstopped(=tachometerindi-
cates stationary motor), the motor control will attempt to restart it. If the
motor control then detects high motor current again, the ”Short circuit
motor” error code will be activated. If on restarting after a first short circuit,
the motor control rotates normally, an error code will not be activated.
This error code can be activated for a number of reasons:
• Shortcircuitinmotor
• Shortcircuitinternallyinmotorwinding(impairedefciency,highercur-
rent consumption)
• Shortcircuitinmotorcables
• Shortcircuitinconnectors
• Dropsofwatercausingshortcircuitsinthemotorconnector
• Shortcircuitinthemotorcontroloutputtransistors
• Badcontactintachosignal
• Badcontactininterlocksignal
Actions:
If the error is a stable one, it is generally not difficult to locate the defective
unit through resistance measurement and testing with the service program.
Further information can be obtained by studying the contents of ”MCU
FAULTLOGGER”.Studythefollowing:
• SHORTCIRCUIT2(specieshowmanytimeserrorcode35hasbeen
active)
• SHORTCIRCUIT1(specieshowmanytimesthecurrentlimithasbeen
exceeded. The difference between short circuit 1 and short circuit 2
indicates how many times there has been a short circuit 1 that has not
been confirmed when restarting the motor).
• LASTFAULTCODEN/8(showsthe8latesterrorcodes)
• TACHOCUT-OUTLOWRPM(cangiveaclueincaseofintermittenter-
rors)
• TACHOCUT-OUTHIGHRPM(cangiveaclueincaseofintermittent
errors)