36
Valve (s) Not Heating
1. Valve not turned “ON” at panel.
2. Valve not plugged into correct
connector.
3. Wrong valve voltage rating
selection (i.e. 230VAC hose on
115VAC system)
4. Tank temperature is set too low at
the front control. The hose will
start heating only after the tank has
reached approx. 80% percentage of
its set temperature.
5. Valve temperature set too low
and/or melt unit is in
standby/setback.
6. Improper mating of pins in the
connector.
7. Loose circuit board connections.
8. Fuse(s) open on Input/Output Power
Board.
9. Valve heater open.
10. Valve Thermistor is open or not
functioning correctly.
1. Turn valve “ON”
2. Connect valve into correct connector.
3. Select correct valve voltage rating
4. Set Tank temperature to correct
temperature setting. Observe
adhesive recommended application
temperature
5. Set valve temperature to proper
setting. Verify the Valve Output LED
is flashing.
Disable standby/setback setting
6. Inspect and make sure connector pins
are not shorting to other pins.
Remove strain relief shell connector
to inspect all wires for damage or
breakage.
7. With power disconnected, remove
front panel and inspect all
connections to the circuit boards.
8. Check fuse(s) with an ohmmeter on
Input/Output Power Board located on
backside of Front Control Panel.
Replace fuse with Fuse Kit
P/N 989360
9. Check valve heater continuity
between pins 7 & 9 of the 9 pin
connector.It should read in the
approximate range of 60 to 245 ohms.
Replace valve wiring assembly
(see section 8) or replace valve.
10. Using an ohmmeter, at room
temperature, the reading on the
thermistor should be approximately
100K ohms. Pins 1 & 2 of the 9 pin
connector. Replace valve wiring
assembly (see section 8) or replace
valve.
