AGI D1660 - 6 Troubleshooting; Solutions Table

7713395 R2 115
6. Troubleshooting
6.1. Solutions Table
In the following section, we have listed some causes and solutions to some of the problems you may encounter.
If you encounter a problem that is difficult to solve, even after having read through this section, please contact
your local dealer or distributor. Before you contact them, please have this operation manual and the serial
number from your machine ready.
Temperature Controller
Problem Check Cause Solution
Temperature control
communication error
If other temperature controls
are visible
Incorrect address of the
temperature controller
Re-address temperature
controller
If other temperature controllers
are not visible
Damaged Modbus
communication wires
Starting at the front of the PLC,
trace Modbus communication
cables to the lowest burner box
Loose connection at gray
communication tee connector
Tighten connection
If problem persists contact dealer
Temperature displays_***
Front of KS45 inside burner
box displays FAIL on top
display
Damaged thermocouple
Repair twisted end of
thermocouple or replace whole
wire
Unable to reach set point
temperature
MAIN MENU->
TROUBLESHOOTING->
TEMPERATURE CONTROLS
If mod motor position is at
100% there is a fuel delivery
problem
Turn fuel regulated pressure at
individual burner up.
CAUTION: DO NOT EXCEED
6 PSI for NG .10 PSI for LP
Actual temperature exceeds set
point
MAIN MENU->
TROUBLESHOOTING->
TEMPERATURE CONTROLS
If mod motor position is at 0%
there is a fuel delivery problem
Turn fuel regulated pressure
down, trouble lighting may
occur if operating pressures are
turned below 1 PSI
Unsteady temperature control
(high and low)
MAIN MENU->
TROUBLESHOOTING->
TEMPERATURE CONTROLS
Unsteady mod motor position
Turn fuel regulated pressure
down, trouble lighting may
occur if operating pressures are
turned below 1 PSI
Thermocouple location and
condition
Location inside the dryer too
close or too far away from
burner
Thermocouple should be
located three tiers from the
floor and five air ducts back
from the burner unless
otherwise instructed by NECO
Thermocouple corrosion
Cut and strip and tightly re-twist
3/4" of thermocouple wire
Natural gas applications Too high of a ramp rate
Troubleshooting–> temperature
controls set ramp rate to 125
CONTINUOUS MIXED-FLOW GRAIN DRYER WITH COMMANDER CONTROL SYSTEM 6. TROUBLESHOOTING