Systems Troubleshooting: 8-8
HIGH PRESSURE SYSTEM
1. The pump will not come up to normal cleaning pressure
Possible Cause Solution
1.1. The pressure
adjusting valve is faulty.
Inspect the valve. Repair or replace if necessary.
1.2. Worn seals or valves
in the pump.
Test the pump output volume directly from the pump
at normal running rpm. If the volume is below the
manufacturer's specications, replace the seals and inspect
for defective valves.
1.3. The pump rpm is too
low.
Check for a loose pump belt. Adjust or replace as
necessary.
Check the engine rpm and adjust as necessary to 2700 rpm
under a 14” Hg vacuum load.
2. Clutch will not turn on or turns o during operation
Possible Cause Solution
2.1. Primary orice plate
or lter clogged
Clean orice plate and lter
2.2. Reduced ow through
heat exchanger
Descale machine
2.3. Dump solenoid faulty Replace solenoid
2.4. RTD sensor not
working properly
Test sensor per the HM RTD Sensor Simulator eld
procedure (164-028)
2.5. Temperature controller
not working properly
Test controller per the HM RTD Sensor Simulator eld
procedure (164-028)
2.6. Potentiometer not
working properly
Test potentiometer per the HM RTD Sensor Simulator
eld procedure (164-028)
3. No pressure reading on gauge
Possible Cause Solution
3.1. The pump belt is
broken.
Inspect and replace if necessary.
3.2. The gauge is faulty. Replace the gauge.
To Next Page
Loading...
