Nordson 2304 - Page 77

froubleshoding
12. Tank, hose orgun
fails to heat or underheats
(continue@)
Problem
IO. Hose and
gun OR
Gun alone not
heating;
yellow LED
off, red LED
on
(continued)
Possible Reason
Failed circuit board
To check (Figure 6.9):
(a) Disconnect hose plug (nonheating
gun) from applicator
(b) Normal resistance reading (power
off!) between hose plug pins 3 and 5
(RTD) at connector JlA - J5A
Normal = 133 ohms at 70°F (21 “C) to
309 ohms at 400°F (205°C)
AND
(a) Disconnect circuit board plug
(nonheating hose) from circuit board
(b) Normal resistance reading (power
off!) between hose plug pins 3 and 5
(RTD) at appropriate connector Jl -
J5 (Figure 6.10)
Failed hose/gun connector assembly
To check:
Normal resistance reading (power
off!) between hose plug pins 3 and 5
(JlA- J5Aas above)
AND
Abnormal resistance reading (power
off!) between hose plug pins 3 and 5
(Jl - J5 as above)
Corrective Action
Replace circuit board
Replace hose/gun connector
assembly
Refer to
Section 7
Section 7,
Section 8
0 Nordson Corporation 1994
All Rights Reserved
P/N 106 701 A
41-23OOSP - l/94