
Honeywell
• 89
HVAC A
PPLICATION
9
Undervoltage
DC-link voltage is under the voltage lim-
its defined.
• most probable cause: too low a
supply voltage
• AC drive internal fault
• defect input fuse
• external charge switch not closed
Fault ID:
80 = Fault
81 = Alarm
In case of temporary supply
voltage break reset the fault
and restart the drive. Check
the supply voltage. If it is ade-
quate, an internal failure has
occurred.
Contact the distributor near to
you.
12
Brake chopper
supervision
• no brake resistor installed
• brake resistor is broken
• brake chopper failure
Fault ID:
110 = Hardware fault
111 = Brake chopper saturation alarm
Check brake resistor and
cabling.
If the these are ok, the chop-
per is faulty. Contact the dis-
tributor near to you.
13
Drive under-
temperature
Too low temperature measured in power
unit’s heatsink or board. Heatsink tem-
perature is under -10°C.
Fault ID:
120 = Fault
121 = Alarm
14
Drive overtem-
perature
Too low temperature measured in power
unit’s heatsink or board. Heatsink tem-
perature is over 100°C.
Fault ID:
120 = Fault
121 = Alarm
Check the correct amount and
flow of cooling air.
Check the heatsink for dust.
Check the ambient tempera-
ture.
Make sure that the switching
frequency is not too high in
relation to ambient tempera-
ture and motor load.
15
Motor stalled
Motor stall protection has tripped.
Fault ID:
140 = Fault
Check motor and load.
16
Motor overtem-
perature
Motor overheating has been detected by
drive motor temperature model. Motor is
overloaded.
Fault ID:
150 = Fault
Decrease motor load.
If no motor overload exists,
check the temperature model
parameters.
17
Motor under-
load
Motor underload protection has tripped.
Fault ID:
160 = Fault
Check load.
41
IGBT tempera-
ture
IGBT temperature (unit tempe
I
2
T) is too high.
Fault ID:
400 = Fault
Check loading.
Check motor size.
Make identification run.
51
1051
External fault
Digital input
52
1052
1352
Keypad com-
munication
fault
The connection between the control key-
pad and drive is broken
Check keypad connection and
possible keypad cable
Fault
code
ID
Fault name
Possible cause
Remedy
Summary of Contents for SmartVFD HVAC MR4
Page 7: ...Honeywell 5 SAFETY ...
Page 49: ...Honeywell 47 COMMISSIONING ...
Page 78: ...STARTUP Honeywell 6 ...