Alliance Laundry Systems CABINET FREESTANDING 9001889R7 - Manual (Page 59)

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Inverter Drive Error Codes
57 9001889
Inverter
overload shut-
off (electronic
overcurrent
protection) If a current of more than 150% of the rated
output current flows and overcurrent shut-
off does not occur (200% or less) inverse-
time characteristics cause the electronic
overcurrent protection to be activated to
stop the inverter output in order to protect
the output transistors.
Note: Resetting the inverter initializes
the internal heat integrating data of the
electronic overcurrent protection. Verify that the AC
drive’s parameters are
correct. Contact Alliance
Laundry Systems’
Customer Service
department.
Fin overheat If the cooling fin overheats, the overheat
sensor is actuated to stop the inverter
output.  Check for too
high ambient
temperature.
 Check for
cooling fin clogging
Verify that the AC
drive’s parameters are
correct.
Contact Alliance
Laundry Systems’
Customer Service
department.
Brake transistor
alarm detection Internal Circuit Error Contact Alliance
Laundry Systems’
Customer Service
department.
Output side
ground fault
overcurrent
protection This function stops the inverter output if a
ground fault overcurrent flows due to a
ground fault which occurred in the
inverter’s output (load) side. Use Pr. 249
“ground fault detection at start” to set
whether the protective function is to be
activated or not. (In the 400V class, the
protective function is always active.) Check the motor cable
insulation and
connection for output
short-circuit/ground
fault. Repair the wiring.
External thermal
relay operation If the external thermal relay designed for
motor overheat protection or the internally
mounted temperature relay in the motor
switches on (contacts open), the inverter
output is stopped. If the relay contacts are
reset automatically, the inverter will not
restart unless it is reset. Check for motor
overheating.
Check to make sure
the machine is loaded
properly and that the
load is balanced. Load the machine
properly to distribute
the load evenly.
Stall prevention The running frequency has fallen to 0 with
stall prevention activated.
Check the motor for a
“locked rotor”
condition. Verify that the AC
drive’s parameters are
correct.
Contact Alliance
Laundry Systems’
Customer Service
department.
Output phase
failure
protection This function stops the inverter output if
one of the three phases (U, V, W) on the
inverter’s output side (load side) results in
open phase. Check the wiring.
Check the motor for a
fault. Tighten the wire
connections.
Replace the
connectors as needed.
Fan fault For the inverter which contains a cooling
fan, FN appears on the operation panel
when the cooling fan fails. Check the cooling
fan’s operation. Replace the fan as
needed.
Operation
Panel
Indication
Name Description and NOTES Check point Corrective action