Honeywell SmartVFD HVAC MR4 User Manual page 160

HVAC A
PPLICATION
3.7.3 Fault codes
Fault
ID Fault name
code
1
Overcurrent
2
Overvoltage
3
Earth fault
Charging
5
switch
Saturation
7
System fault
8
Possible cause
Drive has detected too high a current
(>4*I ) in the motor cable:
H
• sudden heavy load increase
• short circuit in motor cables
• unsuitable motor
Fault ID:
1 = Hardware fault
2 = Software fault
The DC-link voltage has exceeded the
limits defined.
• too short a deceleration time
• high overvoltage spikes in supply
Fault ID:
10 = Hardware fault
11 = Software fault
Current measurement has detected that
the sum of motor phase current is not
zero.
• insulation failure in cables or
motor
Fault ID:
20 = Hardware fault
21 = Software fault
The charging switch is open, when the
START command has been given.
• faulty operation
• component failure
Fault ID:
40 = Hardware fault
Various causes:
• defective component
• brake resistor short-circuit or over-
load
Fault ID:
60 = Hardware fault
• Component failure
• Faulty operation
Fault ID:
600 = Communication between control
board and power unit has failed
601 = Communication between control
board and power unit has interfer-
ence but is still working (ALARM)
602 = Watchdog has reset the CPU
603 = Voltage of auxiliary power in power
unit is too low
604 = Phase fault: Voltage of an output
phase does not follow the refer-
ence
Honeywell
• 88
Remedy
Check loading.
Check motor.
Check cables.
Make identification run.
Make deceleration time
longer.
Use brake chopper or brake
resistor (available as options)
Activate overvoltage control-
ler.
Check input voltage.
Check motor cables and
motor.
Reset the fault and restart.
Should the fault re-occur, con-
tact the distributor near to you.
Cannot be reset from keypad.
Switch off power.
DO NOT RE-CONNECT
POWER!
Contact factory.
If this fault appears simulta-
neously with Fault 1, check
motor cables and motor
Reset the fault and restart.
Should the fault re-occur, con-
tact the distributor near to you.