Machine Errors
PDA Communications Error
These errors may occur during communications. When an error
occurs, the display indicates the error message on the control for
a few seconds. When a PDA communication error occurs, the au-
dit counter Total Bad IR Communications is incremented, the
hour, date, and year of the event are saved, and the error code is
saved. An active machine cycle is not affected when there is an
error during PDA communications.
Open Thermistor Error
Any time the control senses a temperature less than 0°F [-18°C]
after the first three minutes of an active cycle, the control will go
to Cool Down, display this error message, and then turn on the
audio signal. The control will continue to display the error mes-
sage until any of the keypads are pressed, the Cool Down portion
of the cycle has ended, and the temperature reading is greater
than 0°F [-18°C]. Press any keypad to stop audio signal. Once all
three occur, the control will return to the Idle Mode.
Shorted Thermistor Error
Any time the control senses a temperature greater than 210 + 4°F
[99°C + 16°C] during an active cycle, the control will enter the
Cool Down portion of the cycle, display this error message, and
turn on the audio signal. The control will continue to display the
error message until any of the keypads are pressed, the Cool
Down portion of the cycle has ended, and the temperature read-
ing is less than 210°F [99°C]. Press any keypad to stop audio sig-
nal. Once all three occur, the control will return to the Idle Mode.
Stove and Cabinet Limit Errors
There are up to two Stove Limit thermostats and one Cabinet
Limit thermostat on the machine. While the heat relay is on, if the
stove temperature or cabinet temperature reaches the high tem-
perature for the particular limit thermostat, the heater will turn off
automatically and the control will continue the cycle with no heat
until the limit thermostat resets. Once the control reaches the End
of Cycle the control will display the appropriate error message, if
programmed to do so, and sound the audio signal. The control
will continue displaying the error message until the control re-
turns to Idle mode.
NOTE: On some models the stove and cabinet limit
thermostats need to be manually reset. The remainder
of the cycle will be run with no heat. On these models,
the thermostat(s) must be reset prior to cycling power
or the control will return back to Error Mode.
Auto Ignition Retry (Gas Models Only)
If the Ignition Control Module (ICM) fails to ignite the gas valve
the ICM will send an ICM Lockout Alarm to the control. When
the control receives the ICM Lockout Alarm it will increment the
ICM Lockout Alarm audit counter.
If the ICM needs to be manually reset, when the control receives
the ICM Lockout Alarm it will display the Cycle Stopped Menu
with text prompting the user to press the Start keypad to reset the
ICM. The user can continue to reset the ICM until there are no
more programmable retry attempts (factory default is 3) or the
gas ignites. On machines equipped with an ICM that does not
need to be manually reset, when the control receives the ICM
Lockout Alarm it will turn the heat relay off for twenty (20) sec-
onds and then turn it back on to try and ignite the gas. The con-
trol will continue to try and ignite the gas until there are no more
programmable retry attempts (factory default is 3) or the gas ig-
nites. If the ICM fails to ignite the gas on the last attempt the con-
trol will start the Cool Down portion of the cycle, display the heat
error message and sound the audio signal. When the Cool Down
portion of the cycle ends the control will continue to display the
error message until power is cycled to the machine or a user
presses the Back keypad.
Air Flow Switch Errors
The control will flag an Airflow Switch Error under several con-
ditions. Airflow Switch Errors will be processed differently de-
pending upon what state the machine was in when the error was
detected.
Airflow Switch Sensed Closed While Not In Run Mode
If an airflow switch is sensed closed 30 seconds after entering
Idle Mode, Pause Mode or End of Cycle Mode, the control will
display an error message until power is cycled or the error clears.
The cycle will not start and all user inputs will be ignored. If the
error does clear, the control will go back to its previous mode of
operation.
Airflow Switch Does Not Close After Cycle Started
If the airflow switch does not close within 5 seconds of the
start/re-start of a cycle, the control will go to the Cool Down por-
tion of the cycle, display an error message and sound the audio
alarm. Once the Cool Down portion of the cycle ends, the control
will continue to display the error message until the power is cy-
cled to the machine or the Back keypad is pressed.
Airflow Switch Bounces During A Running Cycle
If the airflow switch is open for at least one second, the heat will
be turned off and will remain off until the switch is observed
Machine Errors
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Part No. 70444901ENR10
Содержание CHD25E2-CT025E
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