Wilo ECS19-15.25, Installation And Operating Instructions Manual

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WIL-IO-SP-ECS001-11 6
8. TROUBLESHOOTING
Do not disassemble the motor housing. This pump has NO repairable internal parts, and disassembly may cause an
oil leak or dangerous electrical wiring conditions.
No. Description Qty.
1 Vertical float switch 1
2 Float bracket 1
3 Screw 4
4 Screw 4
5 Shaft 1
6 Adaptor 1
7 Impeller 1
8 Pump body 1
Picture 2
Table 2: Troubleshooting Common Pump Problems
Problem Possible Cause Corrective Action
Pump does not
start or run
1. Blown fuse
2. Tripped breaker
3. Plug disconnected
4. Corroded plug
5. Thermal overload
6. Motor failed
7. Float switch failed
1. Replace fuse
2. Reset breaker
3. Secure plug
4. Clean plug prongs
5. Unplug for 30 minutes, then plug in
6. Replace pump
7. Replace switch
Pump operates
but pumps little
or no water 1. Screen blocked
2. Check valve blocked
3. Debris caught in impeller or discharge
1. Clean screen
2. Clean check valve
3. Remove debris and reassemble impeller
Pump starts and
stops too often
1. Backflow of water from piping, check valve
leaking
2. Float switch failed
1. Install or replace check valve
2. Replace switch.
Pump will not
shut off
1. Float obstructed
2. Defective float switch
1. Remove obstruction and make sure the
switch moves freely
2. Replace switch