Eliwell EWCFW-08 User Manual page 78

CHAPTER 6 - DIAGNOSTICS AND TROUBLESHOOTING
FAULT
E27 -
Serial
communication
error
E28 -
Serial interface
Watchdog
timeout error
E31 It is reset automatically
Keypad when the communication
(HMI-CFW08-RS) between inverter and the
connection fault keypad is reestablished
E32 Power-on
Motor Manual Reset (key
overtemperature Auto-reset
DIx
E41 Contact Eliwell
Self- diagnosis
fault
78
(1)
RESET
)
Table 6.1 (cont.) - Errors, possible causes and reset ways
(1) In case of E04 Fault 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.
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
immediately after the inverter has been enabled.
Solution:
Reduce the switching frequency (P297).
Connect a load reactor in series with the motor supply line.
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 reference and EP (electronic
potentiometer) (when the function "backup of the
POSSIBLE CAUSES
Serial communication error
Serial communication error
Keypad cable misconnected
Electrical noise in the installation (electromagnetic
interference)
Motor is under an overload condition
Duty cycle is too high (too many starts/stops per
minute)
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)
Inverter power circuit is defective