Fault Diagnosis And Countermeasures 67
Fault Code Fault Description
Possible Reasons
Solutions
high.
Fu.14
Inverter overheat
1. Air duct obstruction
2. The environment
temperature is too high.
3. The fan is damaged.
1. Clean air duct or improve
ventilation condition.
2. Improve the ventilation
condition and reduce the
carrier frequency.
3. Change fan.
Fu.15
Reserve
Fu.16
External equipment The exterior fault input
fault
terminal is ineffective.
1. Check the exterior equipment.
2. Disconnect the external
fault input terminal.
Fu.17
~Fu.19
Reserve
Fu.20
Current detection
error
The current detection
devices or circuit is
damaged.
1. Check socket line.
2. Ask for manufacturers’
assistance.
Fu.21
Temperature sensor The temperature sensor is
fault
off-line.
1. Check socket line.
2. Ask for manufacturers’
assistance.
Fu.22
Reserve
Fu.23
PID feedback
off-line
1 The feedback signal is lost.
2. The setting of off-line
detection threshold value
is not appropriate.
1. Check line.
2. Reduce threshold value of
off-line detection.
Fu.24
~Fu.39
Reserve
Fu.40
Internal data The read-write errors of
EEPROM error control parameters
Ask for manufacturers’
assistance.
7.2 Fault record query
The series of inverters recorded the recent fault code occurred in the last four times
and the inverter output parameters of the last fault; query of these information will
contribute to find fault causes.
Monitoring
project
content
d-23
The first fault record
d-24
The second fault record
d-25
The third fault record
Monitoring
project
content
The output current of the last
d-28
fault recently
The output voltage of the
d-29
last fault recently
The direct voltage of the last
d-30
fault recently
E550 Series Universal Low-Power Inverter
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