Troubleshooting: 7-2
HEATING SYSTEM
1.0 Truckmount overheats and shuts down
1.1 The orice or lter screen
are restricted.
Remove and inspect. Clean as necessary.
1.2 The low pressure dump
solenoid is restricted.
Inspect the solenoid and the hose that delivers
water to it. Clean or replace as necessary.
1.3 The dump solenoid is
faulty.
Check the main fuse. If the fuse is blown, inspect
electrical system for worn or shorted wires. Repair
or replace as necessary.
Inspect the solenoid and test for functionality. If the
solenoid is operable, refer to a qualied service
technician to test the temperature controller and
sensor.
2.0 Unable to achieve normal cleaning solution temperature
2.1 Temperature control knob
is turned down.
Inspect the knob. Adjust if necessary.
2.2 The dump solenoid is
faulty.
Inspect the solenoid and test for functionality. If the
solenoid is operable, refer to a qualied service
technician to test the temperature controller and
sensor.
2.3 Excessive solution ow at
tool.
The cleaning tool jet is too large or worn. Inspect the
jet. Replace if necessary.
2.4 The heat exchanger has
hard water scale buildup.
Descale the system.
2.5 The heat exchanger has
blockage on the exhaust
side.
Inspect the interior of heat exchanger. Remove the
debris and clean as necessary.
2.6 The heat selector valve is
in the wrong position.
Move the heat selector valve to the “HOT” position.
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