Got a question? Lines open Mon-Fri 7am-4:45pm. 01452 300592

Common Faults with Booster Sets

Contents - click to view

  1. Min. Threshold Error 22 (when filling the system)
  2. Pump will not start
  3. Low (or zero) discharge rate
  4. Pump vibrates and/or is noisy
  5. Pump runs continuously
  6. Overload trip

1. Min. Threshold Error 22 - when initially filling the system

Possible cause(s) Recommended action
Minimum pressure requirement not reached within set period when filling system for the first time
  1. Turn off main electrical isolator
  2. Close discharge isolation valve
  3. Vent pumps
  4. Turn on main electrical isolator
  5. Check unit runs up to set pressure and pump motors shut down
  6. Open discharge valve slowly ensuring set pressure is maintained

2. Pump will not start

Possible cause(s) Recommended action
No electrical power Check and rectify
Blown fuse Check and rectify
Overload trip Check and (if necessary) reset the overload trip value.

3. Low (or zero) output discharge rate

Possible cause(s) Recommended action

The rotating part(s) of the pump is/are partially or completely obstructed

e.g: impeller obstructed by foreign matter 

Strip the pump to inspect and rectify

Pump not primed - WARNING: running the pump ‘dry’ can cause serious damage to the mechanical seal. 

Having first checked the mechanical seal for damage, prime and air-bleed the pump and try again 

Valve in suction pipework closed or partially closed. 

Check all appropriate valves are fully open. 

Incorrect pump rotation 

Check and rectify. 


4. Pump vibrates and/or is noisy

Possible cause(s) Recommended action

Pump is cavitating

Increase the discharge back pressure slightly by progressively closing a manual isolating valve on the discharge side until the cavitation stops. 

Motor bearings worn

 

Check and rectify

The rotating part(s) of the pump is(are) partially or completely obstructed.

e.g: impeller obstructed by foreign matter. 

Strip the pump to inspect and rectify


5. Pump runs continuously

Possible cause(s) Recommended action

If the pump has a “Hand Control” option on it’s control panel. 

Switching to “Auto” should restore normal control.
If normal control is not returned an immediate service visit is required. 

Pump has no “Hand Control” option. 

 

An immediate service visit is required. 


6. Overload trip

Possible cause(s) Recommended action

Pipework or the pump chamber has a partial blockage. 

Check and rectify

Momentary loss of one phase of power supply. 

Check and try again. 

Discharge flow rate too high. 

Reduce by the discharge flow rate by increasing the discharge back pressure slightly, progressively closing a manual isolating valve on the discharge side: then try again  

Overload trip setting too low for rated duty 

Check and (if necessary) reset the overload trip value 


Would you like to stay in touch?

Receive helpful industry news, technical guidance and product information
 
 
 
Which of these applies to you (this is so we only send you relevant emails)?







 

 

Related Products