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Corrective Action
1. If blown, replace with proper sized fuse or reset
breaker.
2. If voltage is under 108 volts, check wiring size.
3. Replace motor or pump.
4. Replace switch.
5. If impeller will not turn, remove housing and
remove blockage.
6. Make sure float moves freely up and down.
1. Install or replace check valve.
2. Replace switch.
1. Replace switch.
2. Remove pump and clean pump and piping.
3. Make sure float moves freely up and down.
1. If voltage is under 108 volts, check wiring size.
2. Clean out impeller.
RIDGID cat. #
SP330
88557
88562
N/A
N/A
88577
88587
88597
88602
Troubleshooting
Let the pump cool for a minimum of two hours before servicing because the pump contains hot oil under
pressure. Disconnect pump from power source before servicing.
TROUBLESHOOTING CHART
!
WARNING
1. Blown fuse or breaker
2. Low line voltage
3. Worn motor
4. Worn switch
5. Impeller not rotating
6. Float obstruction
1. Backflow of water from
piping
2. Defective switch
1. Defective switch
2. Obstacle in piping
3. Float obstructed
1. Low line voltage
2. Plugged impeller
SP-330, SP-330D, SP-500, SP-500A Submersible Sump Pumps
Ridge Tool Company
7
Symptom
Possible Cause(s)
Pump will not start or run
Pumps start and stops too
often
Pump will not shut off or
thermal protector turns off
Pump operates but delivers
little or no water
Figure
1
2
2a
2b
3
4
5
6
Description
Float Kit
Switch/Top Assembly
Top Assembly/diaphragm
Alarm top assembly/switch
Stator
Lower Bracket/Rotor
Cast Iron Impeller
Cast Iron Volute
RIDGID cat. #
SP330D
N/A
N/A
88567
N/A
88577
88587
88597
90382
RIDGID cat. #
SP500
88557
88562
N/A
N/A
88582
88592
88597
88602
RIDGID cat. #
SP500A
88557
N/A
N/A
88572
88582
88592
88597
88602
1
2
2b
2a
3
4
5
6