Flow Pro Corp.
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| Do It Yourself Troubleshooting: Good Luck |
| Diagnosis | Cause(s) | Solution(s) |
|---|---|---|
| Wiring System |
1. Fuse burned (Note 1) | Replace fuse (Note 1) |
| 2. Loose wire connection, soldering joint, or wire broken | Replace wire kit, re-solder or tighten connector | |
| 3. Microswitch corroded by chemicals or liquids | Replace microswitch | |
| 4. Wire inside figure 8 hose broken because figure 8 hose was used to lift sprayer | Replace wire kit inside figure 8 hose | |
| Battery |
1. Weak battery | Use Flow Pro charger to recharge the battery 12 hours |
| 2. Battery failure because of use of non Flow Pro AC charger | Use only Flow Pro AC charger | |
| 3. Dead battery because of age | Replace battery | |
| 4. Wiring polarity reversed during battery charge (This will damage charger, battery and wiring) |
Connect battery's positive terminal to charger's positive output and battery negative to charger negative output only | |
| 5. AC charger malfunction | Replace AC charger (Flow Pro brand only) | |
| Model 417. 421. 450 |
1. Piston jammed with cylinder because of lack of flushing the sprayer with clean water after usage or usage of sprayer as chemical storage tank. (See Figure l) | Replace pump kit |
| 2. Motor failure because of age or rust build up due to wet/damp. | Replace motor | |
| 3. Gear reducer failure because of age or rust build up due to wet/damp | Replace gear reducer | |
| Model 430. 456 | Motor failure because of age or rust build up due to wet/damp | Replace motor |
| Diagnosis | Cause(s) | Solution(s) |
|---|---|---|
| Battery |
1. Weak battery | Use Flow Pro charger to recharge the battery 12 hours |
| 2. Battery weak because of age or using a non Flow Pro AC charger | Replace battery or use Flow Pro charger to recharge the battery | |
| Spray Gun | Filter or nozzle clogged | Clean nozzle, spray gun and tank filter |
| Model 417. 421. 450 | 1. Piston or cylinder worn because of age (See Figure 1) | Replace pump kit |
| 2. Gear reducer worn because of age or chemicals leak from pump | Replace gear reducer kit | |
| 3. Motor worn because of age | Replace motor | |
| 4. Piston or cylinder worn because of spraying powder chemicals (See Figure 1) | Replace pump kit | |
| 5. Spray Gun valve can't open completely because of stuck o-ring or weak spring | Lubricate O-rings with o-ring oil or o-ring grease, replace spring | |
| 6. Piston assembly's shaft is loose | Reassemble shaft (See Figure 1) | |
| Model 430. 456 |
1. Pressure regulating screw needs adjustment | Adjust pressure adjusting screw |
| 2. Any one of (4) valves broken or deformed | Replace all (4) valves | |
| 3. Diaphragm deformed because of age | Replace pump kit |
|
| 4. Motor worn because of age or rust build up due to wet/damp | Replace motor |
| Diagnosis | Cause(s) | Solution(s) |
|---|---|---|
| Model 417. 421. 450 |
1. Piston O-rings worn or has trapped debris | Replace or clean O-ring(s) (See Figure 1) |
| 2. Hose clamp or plastic tie or hose barb not tight enough | Tighten hose clamp and hose barb, replace plastic ties | |
| 3. Figure 8 hose broken (Note 2) | Replace figure 8 hose | |
| 4. Wand's yellow packing broken | Replace yellow packing | |
| 5. Piston stainless steel shaft bent due to too much pressure or operating freezing temperatures | Replace piston or pump kit | |
| Model 430. 456 |
1. Diaphragm deformed or broken | Replace pump kit |
| 2. Pressure switch diaphragm deformed or broken | Replace pump kit | |
| 3. Delivery hose broken (Note 2) | Replace hose | |
| 4. Hose clamp or hose barb loose | Replace or tighten hose barb/clamp | |
| 5. Wand’s yellow packing broken | Replace yellow packing | |
| 6. Spray Gun O-ring(s) worn or aged | Replace O-ring(s) & lubricate with o-ring oil |
| Diagnosis | Cause(s) | Solution(s) |
|---|---|---|
| Motor or battery |
1. Wiring polarity reversed in motor or battery | Correct wiring polarity |
| Pump |
2. Piston shaft reversed orientation (See Figure 1) | Correct shaft orientation (See Figure 1) |
| 3. Pump inlet & outlet reversed | Correct inlet & outlet hose connections |
Note:
- For Model 417, 421 and 450 the main causes of burned fuse are (a) spraying viscous liquids (b) lack of maintenance by not flushing the sprayer after each use(some chemicals may solidify or build up between the piston and cylinder which causes the fuse to burn) (c) Spraying powder chemicals that may jam the piston. (d) operating sprayer at freezing temperature; For Model 430 & 456 the main causes of the fuse burning out are (a) spraying viscous liquids (b) lack of maintenance by not flushing the sprayer after each use (c)Jammed motor because of bearing rust due to a leak from pump end.
- Flow Pro uses PVC hoses. PVC has many chemical resistance capabilities. In certain chemicals such as termite pesticides the PVC hose requires flushing after each use. The PVC will not resist to long-term exposure to chemicals like termite pesticides. When PVC softens because of chemical attack, this will cause the hose to swell and in Models 430 & 456 to delay the pressure switch response time.