User`s guide

143
CHAPTER 7 - DIAGNOSTICS AND TROUBLESHOOTING
FAULT
RESET
(1)
POSSIBLE CAUSES
E27
Refer to the item 8.24.5.4
Serial communication error
Serial
communication
error
E28
Refer to the item 8.24.5.4
Serial communication error
Serial interface
Watchdog
timeout error
E31
It is reset automatically
Keypad cable misconnected
Keypad
when the communication
Electrical noise in the installation (electromagnetic
(HMI-CFW08-RS)
between inverter and the
interference)
connection fault
keypad is reestablished
E32
Power-on
Motor is under an overload condition
Motor
Manual
Reset
(
key
)
Duty cycle is too high (too many starts/stops per
overtemperature
Auto-reset
minute)
DIx
Ambient temperature is too high
Bad contact or short-circuit (resistance < 100

)
on wiring at terminals XC1:6 and 7 or XC1:7 and 8 of
the control board (wiring that comes from the
motor thermistor - PTC)
E41
Contact WEG
Inverter power circuit is defective
Self- diagnosis
(refer to item 7.3)
fault
NOTE!
Long motor cables (longer than 50 m (150 ft)) can generate
excessive capacitance to ground. This can cause nuisance
ground fault trip and consequently disabling by E00 fault
immediatelyafter the inverter has been enabled.
Solution:
Reduce the switching frequency(P297).
Connect a load reactor in series with the motor supplyline.
Refer to item 8.22.
NOTE!
The faults act as follows:
E00 to E06: switches off the relay that has been
programmed to “no fault”, disables the PWM pulses,
displays the fault code on the display and the “ERROR”
LED flashes. Some data are saved on the
EEPROM
memory
:
keypad
refer
ence and EP (electronic
potentiometer) (when the function “backup of the
(1)
Incase of E04Fault due to inverter overtemperature, allow
the inverter to cool down before trying to reset it.
In the types 7.3 A and 10 A/200-240 V and 6.5 A, 10 A,
13 A, 16 A, 24 A and 30 A/380-480 V fitted with internal
Category C2
RFI-filters, the fault E04 can be caused by
internal airflow overtemperature. Please check blower
installed inside.
Table 7.1
(cont.)
- Errors, possible causes and reset ways