6-20
Troubleshooting
12. Tank, hose or gun
fails to heat or underheats
(ContinuetJl
Problem
Il. Hose alone
not heating;
yellow LED
on, red LED
Off
Possible Reason
Corrective Action
Refer to
Failed hose
Replace hose
To check (Figure 6.9):
(a) Disconnect hose plug (nonheating
hose) from applicator
(b) Abnormal resistance reading
(power off!) between hose plug pins 4
and 6 (heater), pins 4 and 7
(heater-to-ground), and pins 6 and 7
(heater-to-ground) at appropriate
connector Jl A - J5A
Normal (pins 4 and 6) = *lo% of
resistance value listed in Section 9;
(pins 4 and 7) >l megohm; (pins 6
and 7) >l megohm
Failed circuit board
To check:
Replace circuit board Section 7
Normal resistance reading (power
off!) between hose plug pins 4 and 6,
4 and 7 and 6 and 7 (Jl A - J5A as
above)
AND
(a) Disconnect circuit board plug
(nonheating hose) from circuit board
(b) Normal resistance reading (power
off!) between hose plug pins 4 and 6,
4and7and6and7(Jl -J5as
above; Figure 6.10)
Failed hose/gun connector assembly
Replace hose/gun connector Section 7,
To check:
assembly
Section 8
Normal resistance reading (power
off!) between hose plug pins 4 and 6,
4and7and6and7(JlA-J5Aas
above)
AND
(a) Disconnect circuit board plug
(nonheating hose) from circuit board
(b) Abnormal resistance reading
(power off!) between hose plug pins 4
and 6,4 and 7 and 6 and 7 (Jl - J5
as above)
P/N 106 701A
41-23OOSP- l/94
6 Nordson Corporation 1994
All Rights Resmved
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