General Fault Finding Guide - Prochem RC2700 CR2 Safety, Operation & Maintenance Instructions

GENERAL FAULT - FINDING GUIDE
CAUTION - Repairs should only be carried out by a QUALIFIED AND FULLY TRAINED PERSON!
NO POWER
With both vacuum and pump switches in the 'on' position, the vacuum and pump will not run.
PROBABLE CAUSES CORRECTIVE ACTION
Defective power cord Replace power cord
Blown plug fuse Replace fuse
House or building circuit breaker tripped Re-set breaker switch
NO VACUUM
With the vacuum switch in the 'on' position, the vacuum will not run.
PROBABLE CAUSES CORRECTIVE ACTION
Vacuum switch defective Replace switch
Vacuum motor defective Replace
Loose wire connections Check and correct wiring
LOSS OF VACUUM
While the unit is running, there is a loss of suction at the cleaning tool.
PROBABLE CAUSES CORRECTIVE ACTION
Hole in vacuum hose Repair or replace hose
Disconnected or damaged internal hose Repair replace or reconnect hose
Waste tank lid seal defective Replace lid seal
Vacuum hose obstructed Locate and clear obstruction
Vacuum filter clogged Remove, clean and replace
Drain valve open (if fitted) Close drain valve
Vacuum motor defective Replace vacuum motor
NO PUMP PRESSURE
With the pump switch in the 'on' position, the pump will not run.
PROBABLE CAUSES CORRECTIVE ACTION
Defective pump switch Replace switch
Defective internal by-pass or check valve Inspect and replace
Defective pump motor or worn brushes Replace pump, brushes or brush end bell
Seized motor shaft or cam bearing Replace or lubricate bearing
Loose wire connections Check and correct wiring
Defective rectifier Replace rectifier
LOW PUMP PRESSURE
With the pump motor running the spray from the cleaning wand is below normal.
PROBABLE CAUSES CORRECTIVE ACTION
Solution tank filter clogged Clean as necessary
Suction leak at pump inlet Locate leak and repair
Pressure leak at pump outlet Locate leak and repair
Quick connect defective Replace quick connect
Spray tip worn, clogged or incorrectly positioned Replace, clean or re-position
Spray tip non-drip valve seized Dismantle and lubricate
Check valve assembly defective or clogged Clean or replace check valve assembly
Worn cam drive bearing (excessive noise) Replace drive bearing
Low motor speed due to partially seized bearings Lubricate or replace bearings
Clogged spray-tip filters Clean or replace spray tip filters
Pressure regulator incorrectly set or lost prime Re-set pressure regulator or re-prime
CR2 Manual 29/03/21 Page 20 of 29