16
2
）
If the equipment needs to return to factory for maintenance, please contact us.
1
）
3
）
Before return to our factory:
a
）
Please fill in fault information records and feedback to us for reference.
b
）
Please add equipment with safety packaging to avoid shock, collision of the equipment
in transit.
6.4
Common failures and troubleshooting
Table 6.4 Failures and troubleshooting
No.
Failures
Possible Reason
Troubleshooting
1
No display on touch
screen after power
on
Power supply is not connected
Check the power supply
2
Display “-EO-”
Sensor poor contact
Plug sensor plug
Replace sensor
3
Display “-E2-”
Sensor breakdown
Replace sensor
4
Temperature
lose
control
Voltage fluctuation range large
Restart the device after
voltage stabilization
Temperature controller connection
failure
Stop using it and contact us
or professional maintenance
personnel
Temperature controller failure
5
Compressor is
running, but
equipment
refrigeration
effect is poor
Outer ambient temperature is too
high
Reduce the ambient
temperature
Refrigerant leakage
Stop using it and contact us
or professional maintenance
personnel
6
Compressor not
running, has
abnormal noise
starting capacitance breakdown
Compressor breakdown
7
Abnormal
downtime in
working process
Temperature controller failure
Compressor
over
temperature
protection
Improve the ventilation
environment,; check
whether the condenser fan
is jammed or not
