R&M ControlMaster NXT - Page 51

Some of the faults are reset automatically by the software, while others may require the frequency converter to
be powered down.
The causes of the fault(s) must be resolved and both drive commands have to be on the
OFF position for 0.5s before the motor can be started again. In a case of over current fault the supply voltage
must be switched off and back on before it is possible to resume operation.
The warning and fault code numbers and corresponding warnings and faults, possible causes and suggested
solutions are listed in the following table.
Table 11. FAULT CODES
Code Fault Possible cause Suggested solution Resetting
1 Overcurrent • Motor failed
• Short circuit in motor wiring
• Check/replace motor
•
Check/repair motor wiring.
A
2 Overvoltage • Too high supply voltage
• Braking resistor failed
• Break in braking resistor
wiring
• Measure supply voltage and
check hoist supply voltage
from hoist type plate
• Measure braking resistor
resistance
• Check braking resistor and
wiring visually
C
3 Earth Fault • Short circuit in wiring
• Motor failed
• Check/repair wiring
• Check/replace motor
A
8 System Fault • Internal fault • Switch off supply voltage
• If problem recurs, replace
inverter
B
13 Under temperature • Internal temperature too low • Minimum operating
temperature is -30ºC
C
14 Overtemperature • Internal heat sink
temperature too high
• Wait for unit cooling down C
22 API EEPROM
Checksum
• Internal parameter save error • Switch off supply voltage
• If problem recurs, replace
inverter
B
23 POW EEPROM
Checksum
• Internal parameter save error • Switch off supply voltage
• If problem recurs, replace
inverter
B
24 Counter fault • Internal counter error • Switch off supply voltage
• If problem recurs, replace
inverter
B
25 API Microprocessor
Watchdog
• Internal watchdog error • Switch off supply voltage
• If problem recurs, replace
inverter
B
26 POW
Microprocessor
Watchdog
• Internal watchdog error • Switch off supply voltage
• If problem recurs, replace
inverter
B
R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
30/34
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.