
17ENGLISH
7 Faults, possible causes and repairs
Despite being switched on, the motor doesn’t start
The electrical current isn’t
reaching the terminal box
Check the plug / socket connection. Check the length of the cords leading
to the terminal box. Reassemble the motor’s thermal protection or replace
blown fuses. Return to Service Centre.
The electrical current is
reaching the terminal box, but
the voltage is very low
Connect the motor to a supply of 230V, 50 Hz.
For 110V, please use 3KVA transformer.
Pump seized with ice. Motor
rotor seized up Return to an ofcial Service Centre.
The pump is working but the pressure isn’t rising
Insufcient water supply Check the supply hose: the inner diameter should not be less than 15 mm.
Also, the water pressure at the outlet tap should not be less than 1 bar.
Considerable amount of air in
the input water
MAIN
Check ttings are tight and water supply is MIN 1bar with sufcient ow.
TANK
Check water tank is full and hose correctly submerged to draw water to pump.
Water lter is dirty Clean the lter.
The pump’s gaskets are in bad
condition or the pump valves
have seized up
Replace the sealing kit R6.1186.
V1 valve set to minimum pressure
Open the V1 valve until the desired pressure is attained.
Discharge pressure irregular and making considerable noise
Air in the supply water Check the seal at both ends of the supply hose.
Insufcient water supply Check the supply hose: the inner diameter should not be less than 15 mm.
Also, the water pressure at the outlet tap should not be less than 1 bar.
The piping reaches the test pressure but doesn’t maintain the desired pressure
V2 valve isn’t working
correctly
Check the operation of the V2 valve. Clean it and remove any dirt that
the water may have carried inside. Return to Service Centre.
Please note: This appliance is for testing only, NOT for lling a system. Using your
RP PRO III to ll a system will damage or break the appliance! If system is empty,
use another method to ll before pressure testing with your RP PRO III
Switch on appliance (Fig G On appliance) and allow to run until satised that the system is free of
air via bleed point. Then switch off pump and close bleed point immediately!
6. To achieve the desired test pressure:
• Turn on the pump (Making sure control valve V2 is fully OPEN)
• Slowly turn control valve V1 clockwise to +BAR, increasing pressure till desired pressure
is achieved. Use V1 to increase and decrease pressure as required!
• Turn control valve V2 clockwise to CLOSE, then turn off pump IMMEDIATELY!
7. If reading on gauge has exceeded desired pressure. Keeping the pump OFF:
• Carefully open V2 and turn V1 toward –BAR till you reach the desired pressure
• Then close V2
8. When testing is complete:
Turn control valve V2 Anticlockwise fully to OPEN
Turn control valve V1 Anticlockwise fully to –BAR
N.B. When storing appliance between uses and for long periods of time, open V1 & V2
fully then turn knobs back clockwise half a turn to prevent valves from sticking!
!
rp_pro_iii.indb 6 14/10/19 11:37