8-1
ValcoMelton.
SECTION 8 - TROUBLESHOOTING AND REPAIR
SECTION 8 - TROUBLESHOOTING AND REPAIR
SECTION 8 - TROUBLESHOOTING AND REPAIR
SECTION 8 - TROUBLESHOOTING AND REPAIR
SECTION 8 - TROUBLESHOOTING AND REPAIR
Troubleshooting
WARNING!
WARNING!
WARNING!
WARNING!
WARNING!
Only qualified personnel who understand the processes
and is familiar with the safety measures involved should
troubleshoot the equipment. OTHERWISE, DEATH,
PERSONAL INJURY OR DAMAGE TO THE
EQUIPMENT COULD OCCUR.
WARNING!
WARNING!
WARNING!
WARNING!
WARNING!
Troubleshooting may require the unit to be energized.
Therefore, all necessary safety precaution should be
taken while working on the system. OTHERWISE,
DEATH, SERVERE PERSONAL INJURY OR DAMAGE
TO THE EQUIPMENT COULD OCCUR.
This section includes some of the common faults that can occur with the S-
drum hot melt unit. If the problem can not be solved with the information in
this manual, contact your Valco Melton representative.
Problem
Possible Cause
Possible Solution
Machine does not power up
Main power to the unit is not
connected
Connect the main power to the unit
according to the wiring schematic.
Unit is switched off
Turn on the unit using the main
disconnect
Insufficient amount of voltage
being applied to the unit supply
Verify the incoming voltage matches
what is indicated on the nameplate
(±10%).
Unit is not enabled
Castings have overheated
The thermostat was triggered. Allow the
unit to cool down and restart.
Motor will not start
Voltage not being applied to
frequency drive (VFD)
Check that the supply voltage to the
VFD is 240VAC ±10%.
Voltage not being send from
VFD to the motor
Check the voltage to the motor.
Heating zones are over/under
temperature
Wait for all heating zones to reach the
set temperature.
Zone does not heat up
Zone is turned off or not set to
the correct temperature
Check the temperature setting for the
zone and verify that the zone is turned
on.
Zone not heating
Check for blown fuse.
Hose/Gun connector is
unplugged/connected incorrectly
Check the pins on both connectors to
ensure they are in good condition.
Temperature sensor is faulty
Check the resistance of the sensor. If
faulty, replace sensor.
Summary of Contents for D-90
Page 29: ...4 5 ValcoMelton Section 4 Installation MM125 D 90 Hot Melt Unit Electrical Panel ...
Page 49: ...5 10 Valco Cincinnati Inc Section 5 Setup MM125 D 90 Hot Melt Unit Set Language Continued ...
Page 50: ...5 11 Valco Cincinnati Inc Section 5 Setup MM125 D 90 Hot Melt Unit Set Temperature Units ...
Page 56: ...5 17 Valco Cincinnati Inc Section 5 Setup MM125 D 90 Hot Melt Unit Ready Delay Time Continued ...
Page 73: ...5 34 Valco Cincinnati Inc Section 5 Setup MM125 D 90 Hot Melt Unit Sequential Start Valve ...
Page 146: ...C 2 ValcoMelton Appendix C Schematics MM125 D 90 Hot Melt Unit 240V 3Ø 029XX435 ...
Page 147: ...C 3 ValcoMelton Appendix C Schematics MM125 D 90 Hot Melt Unit 240V 3Ø 029XX435 ...
Page 148: ...C 4 ValcoMelton Appendix C Schematics MM125 D 90 Hot Melt Unit ...
Page 149: ...C 5 ValcoMelton Appendix C Schematics MM125 D 90 Hot Melt Unit ...
Page 150: ...C 6 ValcoMelton Appendix C Schematics MM125 D 90 Hot Melt Unit ...