Table 4-2. Unit Troubleshooting - Cont
Test or inspection
1. SOLUTION FEED PUMP AIRLOCKED AT STARTUP - continued
Step 2. Check that solution feed pump diaphragm is good.
Replace diaphragm. Refer to paragraph 4-25.
Step 3. Check that solution feed pump is good.
Replace solution feed pump. Refer to paragraph 4-19.
2. CHLORINE RESIDUAL TEST INDICATES NO CHLORINE IN TREATED WATER
Hypochlorite solution is toxic to skin and eyes. Wear skin
and eye protection to prevent personal injury.
Step 1. Check that solution feed pump is discharging hypochlorite solution.
Close inlet shutoff cock, outlet shutoff cock, and hypochlorite solution shutoff cock.
Disconnect solution feed pump discharge hose with injection nozzle from hypochlorite solution
Hold solution feed pump pump discharge hose aimed toward open reservoir tank assembly.
Open inlet shutoff cock.
Slowly open outlet shutoff cock.
Observe that hypochlorite solution is discharged into the reservoir tank assembly.
Close outlet shutoff cock and inlet shutoff cock.
If hypochlorite solution is discharged, replace antisiphon valve. Refer to paragraph 4-22.
If hypochlorite solution is not discharged, connect solution feed pump discharge hose to
hypochlorite solution shutoff cock and go to step 2.
Step 2. Check that operating water is transferred to the solution feed pump.
Close inlet shutoff cock, outlet shutoff cock, and hypochlorite solution shutoff cock,