RV AQUAJET TROUBLESHOOTING GUIDE

 

 

 

 

1. PUMP DOES NOT RUN

 

Cause Solution

 

Tripped thermal protector/blown fuse Check fuse. If motor is overheated, allow it to cool down prior to restart.

Faulty wire connection or power source Check battery/power supply, polarity, main switch and wiring

Pressure switch controller malfunctioning Replace controller

(P/N 26-158 without fuse)

(P/N 26-158-01 with fuse)

Motor malfunctioning Replace pump

Pump and/or motor is frozen Thaw pump and system and check for damage. The pump/motor may become damaged when a frozen pump is started.

 

 

 

2. PUMP DOES NOT PRIME

 

Cause Solution

 

Water tank empty Fill up tank

 

Leak on inlet side of pump Check tightness of hose connections at pump, filter and tank. Check valves at inlet side

Debris under valves Flush pump (in nominal flow direction) with tap water at maximum flow possible.

Perforated diaphragm Replace diaphragm kit

(P/N L.H. 5503-4V15)

 

Inlet or outlet plumbing restricted Check plumbing. Water should free flow from tank at 2 GPM minimum.

 

 

 

3. PUMP RAPIDLY CYCLES ON/OFF WITH WATER DEMAND

 

Cause Solution

 

Hydraulic pulsations Install pulsation dampener

(P/N 25-174 with elbow fittings)

(P/N 25-175 with straight fittings)

Restriction on outlet side of pump, Check inline filter, if any

resulting in too much back pressure

 

 

4. PUMP RAPIDLY CYCLES ON/OFF WITHOUT WATER DEMAND

 

Cause Solution

 

Leak on outlet side of pump Check tightness of hose selections, check hose for possible damage

Fill valve bypassing to tank Replace fill valve

Debris under valves Flush pump in nominal flow direction. If necessary, disassemble and clean valves

 

 

 

5. PUMP LEAKS

 

Cause Solution

 

Perforated diaphragm Replace diaphragm kit

(P/N L.H. 5503-4V15)

Inlet/outlet fittings leak Replace O-rings and/or fittings

 

 

 

 

6. PUMP KEEPS RUNNING WHEN WATER IS NO LONGER DEMANDED

 

Cause Solution

 

Leak on inlet side of pump Check tightness of hose connections. Check inlet hose, filter, and valves for possible damage

Air in pump Purge air (refer to Aquajet installation guide)

 

Leak on outlet side of pump Check tightness of hose connections, check hose for possible damage

 

Water tank empty Fill up tank

Pressure switch controller malfunctioning Replace controller

(P/N 26-158 without fuse)

(P/N 26-158-01 with fuse)

Low voltage to pump Change battery/power supply.

Check wire gauge (refer to Aquajet

installation guide)

 

 

 

7. LOW FLOW/PRESSURE

 

Cause Solution

 

Leak on inlet side of pump Check tightness of hose connections, check hose for possible damage

Air in pump Purge air (refer to Aquajet installation guide)

Low voltage to pump Change battery/power supply. Check wire gauge (refer to Aquajet installation guide)

Debris under valves Flush pump and/or disassemble and clean valves

Motor malfunction Change pump

 

 

 

 

 

8. PUMP IS EXCESSIVELY NOISY

 

Cause Solution

 

Pump is plumbed directly to rigid tubing Install pulsation dampener

(P/N 25-174 with elbow fittings)

(P/N 25-175 with straight fittings)

Restrictive inlet, pump is cavitating Check plumbing. Water should free flow from tank at 2 GPM minimum.

Pump head loose on motor Tighten screws

 

Pump mounting is loose Tighten screws

 

Pump mounting is too rigid Use flexible tubing and make

sure the dampening rubber feet

are used

Defective motor/drive Replace pump