100
Water pUmp
The water pump is designed to pressurize the fresh water system when not
connected to city water. The water pump must be manually turned on, and is self-
priming, operating on demand as water is used.
WARNING:
Before leaving the motorhome for extended periods of time (i.e. overnight
or longer) be sure that the city water and all water pumps have been turned
off. Damage from neglect will be responsibility of the owner and not the
manufacturer.
To operate the water pump, momentarily press the water pump switch. The light
indicates the water pump is on. The water pump switches are located on the monitor
panel in the hallway and on the roadside water service center. To turn pump OFF,
momentarily press the water pump switch. Do not allow the pump to run when the fresh water supply tank is
empty. Continued operation with a dry tank may open an electrical circuit and/or damage the water pump.
To Use the Water Pump:
Fill the fresh water tank.
Open all water faucets except the drain valves.
Turn the water pump on. Wait for the water lines and the hot water tank to fill.
Close each faucet when it delivers a steady stream of water (cold water faucets first).
Troubleshooting
Vibration induced by road conditions can cause the plumbing or pump hardware to loosen. Check for system
components that are loose. Many symptoms can be resolved by simply tightening the hardware. Check the
following items along with other particulars of the system.
The Water Pump Will Not Start/Blows the Circuit:
Check the electrical connections, fuse, breaker, main switch and ground connection.
Is the motor hot? The thermal breaker may have triggered. It will reset when cool.
Is the voltage present at the switch? Bypass the pressure switch.
Does the pump operate? Check the charging system for correct voltage and check the pump for the proper
ground connection.
Look for an open or grounded circuit or motor.
Check for seized or locked diaphragm assembly (water frozen).
The Water Pump Will Not Prime/Sputters (No Discharge/Motor runs):
Is the strainer clogged with debris?
Is there water in the tank, or has air collected in the hot water heater?
Is the inlet tubing/plumbing sucking in air at plumbing connections (vacuum leak)?
Check for proper voltage with the pump operating.
Look for debris in the pump inlet/outlet valves or dry/swollen valves.
Check the pump housing for cracks or loose drive assembly screws.
The Water Pump Will Not Shut-off/Runs When the Faucet is Closed:
Make sure the fresh water tank fill valve is completely closed.
Check output side (pressure) plumbing for leaks and inspect for a leaky toilet(s) or valves.
Look for loose drive assembly or pump head screws.
Are the valves or the internal check valve held open by debris or is the rubber swollen?
040487h
Water pump
