©2014 4Front
®
Engineered Solutions, Inc.
24
6015653B — HVLS Fans
May 2014
These codes will be shown on the VFD diagnostic device
screen.
VariabLe FreQUency driVe (VFd) – FaULt codeS
Operation Panel
Indication
Name
E---
Faults history
HOLD
Operation panel lock
LOCD
Password locked
Er1 to 4
Parameter write error
Err.
Inverter reset
OL
Stall prevention
(overcurrent)
oL
Stall prevention
(overvoltage)
RB
Regenerative brake pre-
alarm
TH
Electronic thermal relay
function pre-alarm
PS
PU stop
MT
Maintenance signal output
UV
Undervoltage
SA
Safety stop
FN
Fan alarm
E.OC1
Overcurrent trip during
acceleration
E.OC2
Overcurrent trip during
constant speed
E.OC3
Overcurrent trip during
deceleration or stop
E.OV1
Regenerative overvoltage
trip during acceleration
E.OV2
Regenerative overvoltage
trip during constant speed
E.OV3
Regenerative overvoltage
trip during deceleration or
stop
E.THT
Inverter overload trip
(electronic thermal O/L
relay function)
E.THM
Motor overload trip
(electronic thermal O/L
relay function)
E.FIN
Heatsink overheat
to
E.ILF
Input phase loss
E.OLT
Stall prevention stop
E. BE
Brake transistor alarm
detection
E.GF
Output side earth (ground)
fault overcurrent at start
E.LF
Output phase loss
E.OHT
External thermal relay
operation
E.PTC
PTC thermistor operation
E.PE
Parameter storage device
fault
E.PUE
PU disconnection
E.RET
Retry count excess
E.5
CPU fault
E.CPU
E.CDO
Output current detection
value exceeded
E.IOH
Inrush current limit circuit
fault
E.AIE
Analog input fault
E.SAF
Safety circuit fault
Operation Panel
Indication
Name
Fig. 27