Trouble Shooting Guide - Panasonic SR-GA421 Service Manual

SR-GA421/SR-GA281/SR-GA721
3. TROUBLESHOOTING GUIDE
Symptom
● Earlier Switching-off
● Poor cooking finish
Too hard
Too soft
Half-boiled
Keep warm function
● Warming fails (Warm lamp
not shown)
● Warming fails (Warm lamp
shown)
Diagnosis
Poor contact between pan and sheathed
heater? (Check with bubbling test)
No
Center thermostat defective?
(Check with evaporation test)
No
Switch lever has been properly adjusted?
Yes
Usage correct?
● Too small or large in rice quantity.
● Too small or large in water quantity.
● Switched off once by hand in cooking
process.
● Switched off by shocks given in cooking
process.
● Rice not untied.
Micro switch change contact to NO (Warm
mode) after cooking is done?
No continuity of warming heater?
Yes
Yes
No
No
Yes
8
Remedy
● Replace pan or sheathed
heater.
● Replace Center thermostat.
● Adjust switch lever.
● Explain correct usage.
● Adjust switch lever.
● Replace warming heater.