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