Honeywell
Fault Tracing 23
5
11
Output phase
supervision
Current measurement has
detected that there is no current
in one motor phase
Check motor cable and
motor.
13
Inverter undertem-
perature
IGBT switch temperature is under
-10
0
C
Check the ambient tempera-
ture.
14
Inverter overtem-
perature
IGBT switch temperature is over
120 C. Overtemperature warning
is issued when the IGBT switch
temperature exceeds 110
0
C
Check that the cooling air
flow is not blocked.
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 Check motor.
16
Motor overtempera-
ture
Motor overheating has been
detected by inverter motor tem-
perature model. Motor is over-
loaded
Decrease the motor load.
If no motor overload exists,
check the temperature
model parameters.
17
Motor Underload
Motor underload protection has
detected a low load situation
FAN: check that belt is not
broken.
PUMP: check that pump is
not dry.
22
EEPROM check-
sum fault
Parameter save fault
• Faulty operation
• Component failure
Contact technical support.
25
Microcontroller
watchdog fault
• Faulty operation
• Component failure
Reset the fault and restart.
Should the fault recur, con-
tact technical support.
27
Back EMF
protection
34
Internal bus com-
munication
Ambient interference or defective
hardware
Should the fault recur, con-
tact technical support.
35
Application fault
Application does not function
Contact technical support.
50
Analogue input I
in
< 4mA (selected
signal range 4 to 20
mA)
Current at the analogue input is
< 4mA
• Control cable is broken or
loose
• Signal source has failed
Check the current loop
circuitry.
Fault
code
Fault name
Possible cause
Correcting actions
Table 5.1 : Fault codes
