Nordson 2302 - Page 73

Troubleshooting
. 6-15
12. Tank, hose or gun
fails to heat or underheats
(continued)
i
4
Figure 6.8 -
Circuit Board Connector
J6.
-
Problem
i. Tank not
heating with
yellow LED
on or off and
red LED on)
7. Tank not
heating with
yellow LED
on, and red
LED off
Possible Reason
Failed tank RTD
To check (Figure 6.8 circuit board
connector J6):
Abnormally high resistance reading
(power off!) between pins 6 and 8 at
connector J6 on circuit board
Failed circuit board
To check:
Resistance reading (power off!)
between pins 6 and 8 at connector J6
on circuit board = 133 ohms at 7O’F
(21 “C) to 309 ohms at 400°F (205°C)
Failed tank heater
To check:
Abnormally high resistance reading
(power off!) between tank triac wire 6
and circuit breaker wire 2A (Normal =
26 - 31 ohms)
Failed tank triac
Normal resistance reading
Failed circuit board
Tank still does not heat even with new
triac
Corrective Action
Replace RTD
Replace circuit board
Contact your Nordson representative
for service recommendations
Replace tank triac
Replace circuit board
Refer to
Section 7
Section 7
Section 7
43 Nordson Corporation 1994
All Rights Reserved
PIN 106 701A
41-2300SP - l/94