Nordson ProBlue P4 Customer Product Manual page 313

Troubleshooting
Problem
1. No power to melter
2. Tank and/or manifold
not heating, but
power to melter
3. Fuse(s) fail frequently
4. F3 fault on tank or
manifold
E 2014 Nordson Corporation
The following table provides transformer‐specific troubleshooting guidance.
Refer to Section 6, Troubleshooting, for general melter troubleshooting
information.
Possible Cause
Problem with customer power source
No voltage plug installed
Loose/disconnected cables
Blown fuse
Problem with transformer
Programming/control issue
Loose/disconnected cables
Problem in heater
Blown fuse
Power problem
Problem with power distribution
module
F1 or F2 fault: short circuit in heater or
harness
F3, F4, F5, or F6: Transformer is
overloaded
Shorted TRIAC(s)
Noise problem
400/480 Volt ProBlue Adhesive Melters
Corrective Action
Check all three phases at terminal block
Install correct voltage plug
Check cable between transformer and J1
on main board
Check connections between transformer
service terminal block and J2 on power
distribution module
Check fuses F3, F4, F5, and F6
Check voltage into primary of
transformer(s) and voltage at
secondaries.
Turn heaters on/check that tank set‐point
is correct (not 0)
Check connection at J9 on main board
Check connections along heater harness
(intermediate connections, terminals of
heaters, connection back to J3 on power
distribution module
Check for open or short. Cold resistance
values are:
Manifold
175 to 203 ohms
Tank
P4 - 175 to 203 ohms
P7 - 145 to 169 ohms
P10 -145 to 169 ohms
Check F1/F2 on main board
Check all three phases at terminal block
Replace module
Locate and correct short
Verify that total hose/gun power does not
exceed capability of transformer
Replace power distribution module
Isolate sources of noise, change phases
of incoming supply, or add filter/snubber
to incoming supply line
E-19
Part 1024496_06