Nordson 2304 - Page 79

Troubleshooting 6-21
12. Tank, host? or gun
fails to heat or underheats
(continues
Problem
Possible Reason
Corrective Action
Refer to
12. Hose and
Failed hose
Replace hose
gun OR
To check (Figure 6.9):
Gun alone not (a) Disconnect hose plug (nonheating
heating;
hose) from applicator
yellow LED
(b) Abnormal resistance reading
on, red LED
(power off!) between hose plug pins 4
Off
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
AND
(a) Disconnect gun plug (nonheating
gun) from hose
(b) Normal resistance reading (power
off!) between hose plug pins 1 and 2
(heater), pins 1 and ground
(heater-to-ground), and pins 2 and
ground (heater-to-ground) at
appropriate connector Jl 6 - J5B
(Figure 6.11)
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 heater or wiring
Replace heater, repair wiring as
Section 7,
To check:
required Section 6
(a) Disconnect hose plug (nonheating
(wiring
gun) from applicator
diagrams)
(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 JlA - J5A as above
AND
(a) Disconnect gun plug (nonheating
gun) from hose
l
(b) Abnormal resistance reading
(power off!) between hose plug pins 1
and 2 (heater), pins 1 and ground
(heater-to-ground), and pins 2 and
ground (heater-to-ground) at
appropriate connector Jl B - J5B
(Figure 6.11) as above
0 Nordson Corporation 1994
All Rights Reserved
P/N 106 701A
41-23OOSP - II94