Nordson 2302 - Page 75

Troubleshooting
64.7
12. Tank, hose orgun
fails to heat or underheats
(continue@
Figure 6.9 -
Connector JlA - J5A.
I
1
Figure 6.10 - Connector JI - J5.
Problem
1. Hose alone
not heating;
yellow LED
off, red LED
on
Possible Reason
Corrective Action
Refer to
Failed hose
Replace hose
To check (Figure 6.9, connectors JlA
- J5A):
(a) Disconnect hose plug (nonheating
hose) from applicator
(b) Abnormal resistance reading
(power off!) between hose plug pins 8
and 9 (RTD) at appropriate connector
JlA- J5A
Normal = 133 ohms at 70°F (21°C) to
309 ohms at 400°F (205°C)
Failed circuit board
To check:
Replace circuit board
Section 7
Normal resistance reading (power
off!) between hose plug pins 8 and 9
(JlA - J5A as above)
AND
(a) Disconnect circuit board plug
(nonheating hose) from circuit board
(b) Normal resistance reading (power
off!) between hose plug pins 8 and 9
(RTD) at appropriate connector Jl -
J5 (Figure 6.10, connectors Jl - J5)
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 8 and 9
(Jl - J5 as above)
AND
Abnormal resistance reading (power
off!) between hose plug pins 8 and 9
(Jl - J5 as above)
0 Nordson Corporation 1994
All Rights Reserved
PIN 106 701A
4l-23oOSP - l/94