540876_A_PUB_DATE_1_FEB_2012.DOC PROGRAMMING MANUAL 93
TROUBLESHOOTING
FAILURE 95: WATCH DOG
If the watch dog has been activated, message 95 is logged in the Error log register. If this occurs often, ask
the help of a technician.
FAILURE 300-353: MITSUBISHI INVERTER ALARM MESSAGE
Always make sure you have the correct inverter parameter settings in the inverter, especially when you have
replaced an inverter. If you are not sure go to the Configuration menu and select „Inverter Menu…“, set the
correct machine type and supply voltage and load the parameters from the wash computer to the inverter
once more. If the correct parameters are not in the inverter all kind of inverter alarms may occur. See also
inverter manual (available on request) for more info.
Err N° Failure Failure Name Explanation
300 Err OC1 Overcurrent See detailed explanation below
301 Err OC2 Overcurrent See detailed explanation below
302 Err OC3 Overcurrent See detailed explanation below
303 Err OV1 Overvoltage See detailed explanation below
304 Err OV2 Overvoltage See detailed explanation below
305 Err OV3 Overvoltage See detailed explanation below
306 Err THT Inverter overload See detailed explanation below
307 Err THM Motor overload See detailed explanation below
308 Err FAN Fan stopped Repair the cooling fan (clean or replace if necessary)
309 Err OLT Stall prevention See detailed explanation below
310 Err BE Brake transistor Short circuit in brake transistor circuit. Power off
immediately! Replace the inverter.
311 Err GF Ground fault Output overcurrent to ground.
1) Check the motorcable and motor for ground faults.
2) Disconnect the motorcable and try again. If you still
have the error, replace the inverter.
312 Err OHT* Ext thermal relay External thermal relay (TRM module, see electrical
scheme) for motor protection tripped. TRM module was
only used on certain machines with MCB controller and
A500 inverter.
313 Err OPT Option See detailed explanation below
314 Err PE Corrupt memory Memory was overwritten too many times. Replace inverter.
315 Err PUE PU leave out See detailed explanation below
316 Err Ret* Retry no over The max number of retries after fault reached.
The actual inverter error code that causes the problem and
which should be solved, is stored just before Err 316 in the
error log.
317 Err CPU CPU Fault Communication error of built in CPU. Replace inverter
318 Err E.6 CPU Fault 6 Internal fault, If the fault is persistent, replace the inverter
319 Err E.7 CPU Fault 7 Internal fault, If the fault is persistent, replace the inverter
320 Err IPF Instantaneous
power failure
Power failure between 15 and 100ms. Check for bad
contacts in the power circuit. Repair the power supply.
321 Err UVT Under voltage Supply voltage too low. Check jumper P/+-P1.
322 Err LF Output phase
failure
Phase open detected on inverter output. Check for bad
contacts or defect (open) motor windings.
323 Err OP1* Option slot 1 Problem with the option in slot 1 or option contact fault
324 Err OP2* Option slot 2 Problem with the option in slot 2 or option contact fault
325 Err OP3* Option slot 3 Problem with the option in slot 3 or option contact fault
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