
HVAC A
PPLICATION
Honeywell
• 88
3.7.3
Fault codes
Fault
code
ID
Fault name
Possible cause
Remedy
1
Overcurrent
Drive has detected too high a current
(>4*I
H
) in the motor cable:
• sudden heavy load increase
• short circuit in motor cables
• unsuitable motor
Fault ID:
1 = Hardware fault
2 = Software fault
Check loading.
Check motor.
Check cables.
Make identification run.
2
Overvoltage
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
Make deceleration time
longer.
Use brake chopper or brake
resistor (available as options)
Activate overvoltage control-
ler.
Check input voltage.
3
Earth 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
Check motor cables and
motor.
5
Charging
switch
The charging switch is open, when the
START command has been given.
• faulty operation
• component failure
Fault ID:
40 = Hardware fault
Reset the fault and restart.
Should the fault re-occur, con-
tact the distributor near to you.
7
Saturation
Various causes:
• defective component
• brake resistor short-circuit or over-
load
Fault ID:
60 = Hardware fault
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
8
System 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
Reset the fault and restart.
Should the fault re-occur, con-
tact the distributor near to you.
Содержание SmartVFD HVAC MR4
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