Chapter 5: Failure analysis and troubleshooting
Failure analysis and processing procedures
No. Symptom
Possible
Causes
Action
1
No display when
powered up.
No power
Check the power
Fuse failure
Exchange fuse
（
250V 3.0A
5X20mm
）
Broken switch
Replace the switch
Others
Call for service
2
The actual and
displayed
temperatures are
significantly different.
Temperature sensor failure
Call for service
3
“OPEN” in the
temperature display
with a short beep
Temperature sensor failure
or the environmental
temperature is below zero
Call for service
4
“SHORT” in the
temperature display
with a shirt beep
Temperature sensor failure
or the environmental
temperature is below zero
Call for service
5
No heating or cooling
Broken sensor or Broken TE
module
Call for service
6
No reaction when a
key is pressed
Failed film switch
Call for service
