129
Troubleshooting
Error code 36, INTERLOCK HARDWARE
This error code is generated by the motor control. The motor control must
bepoweredwith230V/50or60Hzontheinterlockinputinordertodrive
the motor. The interlock circuits in the motor control have been split into
two channels so that a component error in motor control cannot give a
false confirmation that the door is locked. These two channels are checked
against each other. If this check gives an incorrect result, the ”INTERLOCK
HARDWARE” error code will be activated.
The reason for this error code being activated can be attributed to an error
in the interlock circuits in motor control.
Action:
• Replacemotorcontrol.
Error code 37, LOW DC VOLTAGE
This error code is generated by the motor control unit. The motor control
unit constantly measures the voltage over the mains input. If the voltage
istoolow(=fallsbelowacertainlimit),themotorcontrolunitwillshutoff
thecurrenttothemotor.Oncethemotorhasstopped(=thetachosensor
indicates that the motor is stationary), the motor control unit checks to
see whether the input voltage is still low. If it is, an error code is activated:
”LOWDCVOLTAGE”.
The reason for this error code being activated can be low mains voltage or
that the machine’s on/off switch has been operated in an unsuitable man-
ner. Further information can be obtained by studying the contents of ”MCU
FAULTLOGGER”:
• UNDERVOLTAGE2(specieshowmanytimeserrorcode37hasbeen
active)
• UNDERVOLTAGE1(specieshowmanytimesthevoltagehasdrop-
ped below the limit. The difference between undervoltage 1 and under-
voltage 2 indicates how many times there has been an undervoltage 1
without it being confirmed when the motor has stopped).
• LASTFAULTCODEN/8(showsthe8latesterrorcodes)
Undervoltages can be registered even during normal operation. Conse-
quently, a small number of registrations need not mean that there is an
error in the motor control.
Measure:
• Checkthatthesupplyvoltageisstableandneverdropsbelownominal
voltage - 10%.
• Checkthatthefusesandcablesarenoterrory.
• Checkthesupplyvoltageinthenetworkcablingandatthemotorcon-
trol system in the machine.