| 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. |
|
| 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. |