Failure status |
Cause of failure |
Check procedures/corrective measures |
(1)The machine does not operate at all when turning the power on. |
1. Power is not supplied to the outlet. |
Check input voltage. |
2. Power plug connection is defective. |
Check the contact between the power plug and outlet is secure. |
3. Top cover isn't securely closed. |
Close the top cover firmly. |
4. Broken power cord. |
Check the continuity and replace if there is no continuity. |
5. Connected to the power switch. |
Check the continuity between the low voltage power supply PWB and replace it if there is no continuity. |
6. Fuse melt-down on the low voltage power PWB. |
Replace the low voltage PWB after investigating the cause of melt-down. |
7. The interlock switch is defective. |
Check the continuity between the interlock switch contacts. Replace the low voltage power supply PWB if there is no continuity. |
8. Low voltage power supply PWB is defective. |
Replace the low voltage power supply PWB. |
9. Main/Engine PWB is defective. |
Replace the main/engine PWB. |
(2)The right cooling fan motor does not rotate. |
1. Right cooling motor coil is broken. |
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2. Wire or connector failure between the right cooling fan and main/engine PWB (YC7). |
If the connector is not inserted enough, reinsert it. Or check the wire's continuity, and repair or replace the wire if there is no continuity. |
3. Main/Engine PWB is defective. |
Replace the main/engine PWB. |
(3)The left cooling fan motor does not rotate. |
1. Left cooling motor coil is broken. |
Check the continuity of the left cooling fan and replace if there is no continuity. |
2. Wire or connector failure between the left cooling fan and main/engine PWB (YC1). |
If the connector is not inserted enough, reinsert it. Or check the wire's continuity, and repair or replace the wire if there is no continuity. |
3. Main/Engine PWB is defective. |
Replace the main/engine PWB. |