Troubleshooting (continued)
Problem
Possible Cause
Corrective Action
Heater out not
responding
System disabled
Enable the controller by pressing and holding the ENABLE/DISABLE key
(
) for 4 seconds until the controller is ENABLED.
MODE set to OFF on
HEATERS screen
Verify that the appropriate heater channel MODE is set to ON. Refer to
“Setting Up the Heater Control.”
Flashing Heater Fault
System Alarm
If the heater outputs shorted or an over-current condition occurred: Find
the cause of the over-current condition, physically correct the problem,
then clear the alarm. When a Heater Fault alarm occurs, both heaters
immediately switch off.
If a safety shutoff occurred: The heater actual reading was below its
setpoint by 10 °C for longer than a minute, therefore triggering a Heater
Fault System Alarm. Inspect the system and clear the alarm. When a
Heater Fault alarm occurs, both heaters immediately switch off.
Flashing TC Fault
System Alarm
A thermocouple disconnect condition has occurred while the heater was
ON. Verify the thermocouple wiring and integrity. When a TC Fault alarm
occurs, both heaters immediately switch off. Clear the alarm to resume
normal operation. Refer to “Clearing a Thermocouple (TC) Fault Alarm.”
Problem with wiring
integrity
Ensure that the wiring is correctly stripped and that the conductors are
making contact with the screw terminal connector.
GPO not
responding to
a GPI initiate
signal
System disabled
Enable the controller by pressing and holding the ENABLE/DISABLE key
(
) for 4 seconds until the controller is enabled.
MODE set to OFF on
GENERAL PURPOSE
IO screen
Verify that the appropriate GPIO channel MODE is set to ON. Refer to
“Setting Up the General Purpose IOs.”
TIME,DELY, ON, or
OFF on GENERAL
PURPOSE IO screen
set to 0.0000 (sec)
Set TIME,DELY, ON, and OFF to a non-zero value. Refer to “Setting Up
the General Purpose I/Os.”
Problem with initiate
signal integrity (GPI)
Verify that the signal being used on the voltage initiate circuit is a clean,
bounce-free signal.
Problem with wiring
integrity
Ensure that the wiring is correctly stripped and that the conductors are
making contact with the spring terminal connector.
Current exceeded
200 mA on GPO pins
Remove all connections to the GPO pins, switch off the controller, and
allow the controller to cool for 10 minutes.
Flashing System
Alarm IN
Remove or disable the system alarm. The unit will not initiate if there
is an input alarm present. Refer to “Clearing an Alarm Input or Auto
Increment Mode Alarm.”
Initiate applied to the
wrong pins
Ensure that the initiate signal is applied to the same GPI channel as it is
for the desired GPO channel.
Continued on next page
ValveMate 9000 Controller
58
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