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Troubleshooting
Problem
Front panel not lit.
Open Sensor LED is activated and
flashes RED. Affected zone LED will
flash RED.
Unit circuit breaker, on/off switch is
tripped.
20
Cause
Unit not plugged in or turned on.
Wire harness connections not con-
nected or need replacing. Fuse dis-
connected or needs replacing.
Sensor condition is detected in the
applicator, melt unit, and/or hose.
Operator significantly lowers tank set
temperatures after tank has reached
set temperature.
Troubleshooting
Solution
Plug in unit. Turn on/off switch ON.
Check all power supply connections
to the front panel. Replace if neces-
sary, see Replacing front panel,
page 25. Check fuse with ohmmeter,
replace if necessary.
Check hose and applicator electrical
connections. Make sure pins are
lined up correctly and are secure.
Check tank thermistor assembly with
ohmmeter, which should read
approximately 100,000 ohms at room
temperature. Replace if necessary,
see Replacing thermistor assem-
bly, page 33.
Check hose thermistor assembly with
ohmmeter. Replace hose. See
Replacing hose, page 23.
Check applicator thermistor assem-
bly. See appropriate applicator man-
ual.
Turn the circuit breaker ON and
quickly press temperature increment
, increasing desired tank temper-
ature.
Allow tank to cool below or equal to
operator's set temperature.
309832D
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