ITW Dynatec
D SERIES V6 DCL ASU Manuals
Troubleshooting Page 7-25
Revised 10/14
Solution
1. Visually examine affected hose/ head-
plug and ASU socket for cleanliness and
proper contact and seating. Refer to wir-
ing diagram for pin identification. The
problem can be isolated by plugging the
affected hose/ head into another ASU
socket. If the new hose number is then
displayed as malfunctioning, the problem
is in the hose that was moved. Repair or
replace hose or head or ASU hose/ head
harness as appropriate.
2. Verify that the hose harness is properly
inserted into its Power or AUX Power
Module plug. Check for loose leads,
debris and proper contact.
3. Visually inspect wiring inside head.
Verify that cartridge heater leads ar prop-
erly connected in the service block area.
4. Use an ohmmeter to measure resist-
ance of head cartridge heater. Refer to
resistance table for resistance values. In-
finitely high resistance indicates an open
heater. Replace car tridge heater as appro-
priate.
5. If fuse is found to be blown, do not re-
place it without first finding cause. Look
for a short circuit to ground in the head
heater circuit, particularly inside the head
at the connections in the service block
area. If replaced fuse also blows, Power
or AUX Power Module may be the
cause. However, fuse failure is usually
due to a problem in the head heater cir-
cuit, not the Power or Aux P ower Mod-
ule.
6. Visually inspect ASU wiring and use
an ohmmeter and the wiring diagram to
locate open wire i n head heater circuit.
Repair or replace ASU hose harness or
other ASU wiring as necessary.
Problem Possible Cause
Hose/ Head (No.)* 1. Disconnection between
Not Heating hose/ head and ASU.
(Heater Circuit Open)
2. Disconnection between
hose/ head harness and
Power or AUX Power
Module.
3. Disconnection between
cartridge heater and cable
assembly inside head.
4. Open head heater element.
5. Head/ hose fuse on Power
Module or AUX Power
Module is inoperative.
6. Open wiring inside ASU.
Plug
Sensor
Heater
Sensor &
Heater
ASU Socket and
Hose/ head Plug
* Check each Hose/Head circuit on the system
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