Intermediate Problem Solving
TYPE OF | WHAT TO CHECK | WHAT TO DO | |||
PROBLEM | If check is OK, go to next check | When check is not OK, refer to this column | |||
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Spray Pattern | 3. | Check pressure adjustment potentiometer (77) by |
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Variations |
| replacing it with a new one. |
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(continued) |
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4. | Check Low Output section, page 16. |
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Motor Is Hot and | 1. | Determine if sprayer was operated at high pressure | 1. | Decrease pressure setting or increase tip | |
Runs Intermittently |
| with small tips, which causes excessive heat build |
| size. | |
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| up. |
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| 2. | Be sure ambient temperature where sprayer is lo- | 2. | Move sprayer to shaded, cooler area if | |
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| cated is no more than 90_F (32_C) and sprayer is |
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| not located in direct sun. |
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| 3. | Check motor. | 3. | Replace motor. See page 23. | |
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Building Circuit | 1. | Check all electrical wiring for damaged insulation, | 1. | Repair or replace any damaged wiring or | |
Breaker Opens As |
| and all terminals for loose fit or damage. |
| terminals. Securely reconnect all wires. | |
Soon As Sprayer |
| Also check wires between pressure transducer |
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Switch Is Turned |
| and motor. See page 23. |
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On. |
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2. | Check for missing motor brush inspection plate | 2. | Correct faulty conditions. | ||
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| gasket (see page 21), bent terminal forks or other |
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| metal to metal contact points which could cause a |
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| short. |
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3.Check motor armature for shorts. Use an armature tester (growler) or perform motor test. See page 18. Inspect windings for burns.
3. Replace motor. See page 23.
| 4. | Check motor control board (22a) by performing | 4. Replace board. See page 24. |
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| motor control board diagnostics on page 24. If |
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| diagnostics indicate, substitute with a good board. |
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| CAUTION: Do not perform this check until motor |
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| armature is determined to be good. A bad motor |
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| armature can burn out a good board |
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Circuit breaker | 1. | Check ‘Basic Problems – Electrical’ on page 14. |
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opens after sprayer |
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operates for 5 to 10 |
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minutes. |
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Building circuit breaker opens as soon as sprayer is plugged into outlet and sprayer is NOT turned on.
1.Check ON/OFF switch (80). Be sure sprayer is unplugged! Disconnect wires from switch. Check switch with ohmmeter. The reading should be infinity with ON/OFF switch OFF, and zero with switch ON.
CAUTION: A short in motor circuit can damage switch and or motor control board (22a).
1. Replace ON/OFF switch. See page 25.
2.Check for damaged or pinched wires in junction box (20).
2. Replace damaged parts.
Unit will not run on generator but does run on AC power
1.Check the generator’s “peak” voltage. This sprayer will not run if the peak voltage is above 190V or below 100V.
1. Use AC power or a different generator.
18 308801