Section 5 — Troubleshooting
Guardian
5.1TROUBLESHOOTING GUIDE
PROBLEM | CAUSE | CORRECTION | ||
The engine will not crank. | 1. | Fuse blown | 1. | Replace 15A fuse on generator |
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| control panel. |
| 2. | Loose, corroded or defective | 2. | Tighten, clean or replace |
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| battery cables |
| as necessary. |
| 3. | Defective starter contactor (7 kW) 3. | * | |
| 4. | Defective starter motor | 4. | * |
| 5. | Dead Battery | 5. | Charge or replace battery. |
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The engine cranks but | 1. | Out of fuel | 1. | Replenish fuel. |
will not start. | 2. | Defective fuel solenoid (FS) | 2. | * |
| 3. | Open #14 wire from | 3. | * |
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| engine control board |
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| 4. | Defective spark plug(s) | 4. | Clean, |
| 5. | Valve lash out of adjustment. | 5. | Reset valve lash. |
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The engine starts hard | 1. | Air cleaner | 1. | Check, replace air cleaner. |
and runs rough. |
| plugged or damaged |
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| 2. | Defective spark plug(s) | 2. | Clean, |
| 3. | Fuel regulator not set. | 3. | Set fuel regulator. |
| 4. | Fuel pressure incorrect. | 4. | Confirm fuel pressure is at |
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| water column (0.4 psi - 0.5 psi). |
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The AUTO/OFF/MANUAL switch | 1. | Defective switch | 1. | * |
is set to OFF, but the engine | 2. | AUTO/OFF/MANUAL switch | 2. | * |
continues to run. |
| wired incorrectly |
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| 3. | Defective control board | 3. | * |
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There is no AC output from | 1. | Main line circuit breaker open | 1. | Reset circuit breaker |
the generator. |
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| to ON (or closed). |
| 2. | Generator internal failure | 2. | * |
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There is no transfer to | 1. | Defective transfer switch coil | 1. | * |
standby after utility | 2. | Defective transfer relay | 2. | * |
source failure. | 3. | Transfer relay circuit open | 3. | * |
| 4. | Defective control logic board | 4. | * |
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Unit consumes large | 1. | 1. | * | |
amounts of oil. |
| not followed (see Section 3.1) |
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*Contact the nearest Generac Authorized Dealer for assistance.
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