Haier EA-1770EG Service Manual page 21

8.5. Trouble-Shooting
In case that there are complaints from the customers, please study the reported
troubles carefully. For the problems listed below, please introduce the proper usage to the
customers to avoid necessary troubles.
Attention:
(1) Please first check the installation of the earth wire before trouble-shooting.
(2) Be extremely careful to touch the high-voltage circuit.
(3) Discharge the high-voltage capacitor.
(4) In checking the continuity of the controller or the high-voltage transformer,
you shall do the checking under the condition that the AC power source is
switched off, and one wire is cut off from the part. Otherwise the result is
not accurate, or even damages the measure device.
(5) Do not touch the IC die on the PCB board to protect it from the damage of
the static electricity.
1.
reason:
A. The power terminal box has too many plugs and over load, Avoid sharing one line with
other electric appliances.
B. The power plug is not tightly inserted, Confirm the plug is inserted tightly.
2.
reason:
A. The input Ac voltage is too low, connect the microwave oven to power source with
sufficient voltage.
B. The temperature to cook the food is too low ,Prolong the cooking time .
3.
reason:
A. Metal container is used in cooking and touches the cavity, please use containers stipulated
in the operation instructions.
B. Containers embedded with metal or silver head are used in cooking
4.
reason:
The microwave intensity is uneven
A .pack the thinner part with aluminum foil.
B. Use preservative file or cover.
C. When cooking soup, drink or milk, please stir once or twice during cooking.
Maintenance Service and Trouble Shooting
The oven doesn't work
The microwave output power consumption is too low
Lighting and sparking
Uneven cooking
- 20 -