External components can be identified from below.
To protect against electric shocks or excess current, the unit is equipped with a 1.0 ampere MDL Slo-blo fuse for
115 VAC and 0.5 ampere MDL Slo-blo fuse for 230 VAC. Only a 1.0 ampere (115 VAC) or 0.5 (230 VAC) type
MDL: 1.0 ampere (115 VAC) or 0.5 ampere (230 VAC) type 3 AG Slo-blo fuse should be used.
If a fuse continually blows: (1) Pump is stalled because of plugged discharge line.
Discharge pressure is too high.
Voltage supply is too high.
Excessive line transients are present.
Internal Drive Mechanism
It is recommended that repairing of the drive mechanism be done by authorized factory service station only.