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Quattro DC Troubleshooting
Name Description
Possible Causes & Corrective Action
Overvolt Flt
The DC bus voltage has
exceeded the maximum
allowed value.
Low Input Voltage
Check INPUT L-L VOLTS (A5) and UV FAULT
LEVEL (A4)
Verify proper input voltage and increase, if
necessary, the input AC voltage within the
proper range
Check for missing input phase
Check power line disturbances due to starting
of other equipment
Line Converter Problem
Verify the line converter did not shutdown
while the motor controller was in process of
regeneration
Check Parameter Settings
Bad tuning of either the motor side regulators
Contactor Problem
Verify motor contactor did not open while
motoring
Ovrtemp Alarm
(alarm)
One or more of the IGBT
modules on the drive side
power bridge has exceeded
95
°C (203°F).
Excessive Heat
Check for cooling fan failure
Reduce Ambient Temperature
Clean heat sink
The revision level for
parameter data shared
between the line side and
motor side processors does
not match.
Software Incompatibility
Param rev
Contact Factory
PCU data Flt
PCU parameters checksum is
invalid on the motor side.
Parameters Corrupted
Check parameters and power cycle
If re-occurs, replace Main Control PCB A2
Ready, Waiting
For Drive
(operator)
The operator is waiting to
establish communications with
the drive’s control board.
Normal, if displayed momentarily
No action is required, if the message
disappears shortly after power-up of the
operator
Bad Connector Connection
Remove and re-seat the operator in its cradle
If re-seating of the operator does not work, the
operator may need to be replaced
Reverse Tach
See ENCODER FLT See ENCODER FLT
S-Chain Event
(alarm)
Elevator Safety Chain opened
while the drive was running.
Safety Chain Problem
Safety Chain was opened during a run
Verify correct Safety-Chain operation and
timing
Setup Fault 4
This fault is declared if the
contract motor speed (in rpm)
and encoder pulses/revolution
do not satisfy:
0
,000,18000,300 〈
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎝
⎛
〈
pulses
encoder
speed
motor
contract
Check Parameters Settings:
Check ENCODER PULSES (A1) parameter for
correct setting
Check CONTRACT MTR SPD (A1) parameter
for correct setting
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