Taylor-Wharton KRYOS Controller - Manual (Page 18)

16
KRYOS
Test Level Sensors
The sensor assembly can be tested through the menu system (MENU, 2, 1). The
sensor diagnostics indicates the sensor number and the status (whether in liquid
or gas) of that sensor. If the control is set for an eight-thermistor or Freeze-Guard
sensor it will indicate 8 sensors in the diagnostics. Likewise, if it is set for a four-
sensor assembly, it will indicate 4 sensors. The status is indicated with either an “O”
for open, a “G” for gas or an “L” for liquid. This is an easy means to tell if sensors
are in or out of liquid or if a new sensor assembly is needed (open sensors).
Sensor Type The sensor type can be set through the menu system (MENU, 2, 4). The
sensor type selection should match the sensor type that is being used in the system.
This is a 4-sensor, a 7-sensor (Freeze-Guard) or an 8-sensor array. If the sensor
assembly is unplugged and the main control is still on, the display will indicate
that a sensor error has occurred. In addition the level indicated would be 8” on an
8-sensor assembly, 7” on a Freeze-Guard assembly or “High Alarm” on a 4-sensor
assembly. This occurs because the control cannot differentiate between a very high
resistance (when a thermistor is in LN
2
) and an infinite resistance (when an open
circuit appears in the level sensing circuitry).
Alarms and Error Conditions
The KRYOS control tracks many different conditions in the freezer and therefore, has
a full complement of alarms associated with these different conditions. As alarms
occur, they cause an audible beep as well as a flashing red light. A remote alarm
relay is also triggered following a user-designated period of time, after the error
condition occurs, if it is not corrected. In addition, the error condition is displayed
on the top line until the error condition is corrected. When an error does occur, the
audible alarm may be muted by pressing the designated button. The audible alarm
will then be silent until activated by a new error condition. The red light will continue
to flash until all errors are corrected. The remote alarm will be activated if the power
is interrupted.
The High Temperature Alarm for Thermocouple #1 can be set through the menu
system (
MENU, 3, 1). This alarm is activated if the temperature rises above the
designated temperature. The alarm temperature can range from 0ºC to -190ºC. It
can also be disabled.
The High Temperature Alarm for Thermocouple #2 can be set through the menu
system (
MENU, 3, 2). This alarm is activated if the temperature rises above the
designated temperature. The alarm temperature can range from 0ºC to -190ºC and
it can also be disabled.
System Alarms
The Low LN
2
Supply Alarm can be set through the menu system ( MENU, 3, 3, 1).
This alarm is activated if the solenoid valve is not closed within a designated time
period after a fill starts. The solenoid valve can be closed either automatically (the
LN
2
level reaches the STOP FILL sensor) or manually (the stop fill button is pressed)
to stop the timer which activates this alarm. The possible choices for this alarm are
None, 15, 30, 45, 60 minutes, 2 or 3 hours. This alarm does not correct itself until
the fill is stopped (the solenoid closes).
The Sensor Error Alarm can be set through the menu system ( MENU, 3, 3, 2). This
alarm is activated if the control detects a sensor error such as an open sensor. The
possible choices are ENABLE or DISABLE. An open sensor can be confirmed through
the TEST LEVEL SENSORS option in the menu system (
MENU, 2,1).
Sensor Type.
16
KRYOS
Test Level Sensors
The sensor assembly can be tested through the menu system (MENU, 2, 1). The
sensor diagnostics indicates the sensor number and the status (whether in liquid
or gas) of that sensor. If the control is set for an eight-thermistor or Freeze-Guard
sensor it will indicate 8 sensors in the diagnostics. Likewise, if it is set for a four-
sensor assembly, it will indicate 4 sensors. The status is indicated with either an “O”
for open, a “G” for gas or an “L” for liquid. This is an easy means to tell if sensors
are in or out of liquid or if a new sensor assembly is needed (open sensors).
Sensor Type The sensor type can be set through the menu system (MENU, 2, 4). The
sensor type selection should match the sensor type that is being used in the system.
This is a 4-sensor, a 7-sensor (Freeze-Guard) or an 8-sensor array. If the sensor
assembly is unplugged and the main control is still on, the display will indicate
that a sensor error has occurred. In addition the level indicated would be 8” on an
8-sensor assembly, 7” on a Freeze-Guard assembly or “High Alarm” on a 4-sensor
assembly. This occurs because the control cannot differentiate between a very high
resistance (when a thermistor is in LN
2
) and an infinite resistance (when an open
circuit appears in the level sensing circuitry).
Alarms and Error Conditions
The KRYOS control tracks many different conditions in the freezer and therefore, has
a full complement of alarms associated with these different conditions. As alarms
occur, they cause an audible beep as well as a flashing red light. A remote alarm
relay is also triggered following a user-designated period of time, after the error
condition occurs, if it is not corrected. In addition, the error condition is displayed
on the top line until the error condition is corrected. When an error does occur, the
audible alarm may be muted by pressing the designated button. The audible alarm
will then be silent until activated by a new error condition. The red light will continue
to flash until all errors are corrected. The remote alarm will be activated if the power
is interrupted.
The High Temperature Alarm for Thermocouple #1 can be set through the menu
system (
MENU, 3, 1). This alarm is activated if the temperature rises above the
designated temperature. The alarm temperature can range from 0ºC to -190ºC. It
can also be disabled.
The High Temperature Alarm for Thermocouple #2 can be set through the menu
system (
MENU, 3, 2). This alarm is activated if the temperature rises above the
designated temperature. The alarm temperature can range from 0ºC to -190ºC and
it can also be disabled.
System Alarms
The Low LN
2
Supply Alarm can be set through the menu system ( MENU, 3, 3, 1).
This alarm is activated if the solenoid valve is not closed within a designated time
period after a fill starts. The solenoid valve can be closed either automatically (the
LN
2
level reaches the STOP FILL sensor) or manually (the stop fill button is pressed)
to stop the timer which activates this alarm. The possible choices for this alarm are
None, 15, 30, 45, 60 minutes, 2 or 3 hours. This alarm does not correct itself until
the fill is stopped (the solenoid closes).
The Sensor Error Alarm can be set through the menu system ( MENU, 3, 3, 2). This
alarm is activated if the control detects a sensor error such as an open sensor. The
possible choices are ENABLE or DISABLE. An open sensor can be confirmed through
the TEST LEVEL SENSORS option in the menu system (
MENU, 2,1).
16
KRYOS
Test Level Sensors
The sensor assembly can be tested through the menu system (MENU, 2, 1). The
sensor diagnostics indicates the sensor number and the status (whether in liquid
or gas) of that sensor. If the control is set for an eight-thermistor or Freeze-Guard
sensor it will indicate 8 sensors in the diagnostics. Likewise, if it is set for a four-
sensor assembly, it will indicate 4 sensors. The status is indicated with either an “O”
for open, a “G” for gas or an “L” for liquid. This is an easy means to tell if sensors
are in or out of liquid or if a new sensor assembly is needed (open sensors).
Sensor Type The sensor type can be set through the menu system (MENU, 2, 4). The
sensor type selection should match the sensor type that is being used in the system.
This is a 4-sensor, a 7-sensor (Freeze-Guard) or an 8-sensor array. If the sensor
assembly is unplugged and the main control is still on, the display will indicate
that a sensor error has occurred. In addition the level indicated would be 8” on an
8-sensor assembly, 7” on a Freeze-Guard assembly or “High Alarm” on a 4-sensor
assembly. This occurs because the control cannot differentiate between a very high
resistance (when a thermistor is in LN
2
) and an infinite resistance (when an open
circuit appears in the level sensing circuitry).
Alarms and Error Conditions
The KRYOS control tracks many different conditions in the freezer and therefore, has
a full complement of alarms associated with these different conditions. As alarms
occur, they cause an audible beep as well as a flashing red light. A remote alarm
relay is also triggered following a user-designated period of time, after the error
condition occurs, if it is not corrected. In addition, the error condition is displayed
on the top line until the error condition is corrected. When an error does occur, the
audible alarm may be muted by pressing the designated button. The audible alarm
will then be silent until activated by a new error condition. The red light will continue
to flash until all errors are corrected. The remote alarm will be activated if the power
is interrupted.
The High Temperature Alarm for Thermocouple #1 can be set through the menu
system (
MENU, 3, 1). This alarm is activated if the temperature rises above the
designated temperature. The alarm temperature can range from 0ºC to -190ºC. It
can also be disabled.
The High Temperature Alarm for Thermocouple #2 can be set through the menu
system (
MENU, 3, 2). This alarm is activated if the temperature rises above the
designated temperature. The alarm temperature can range from 0ºC to -190ºC and
it can also be disabled.
System Alarms
The Low LN
2
Supply Alarm can be set through the menu system ( MENU, 3, 3, 1).
This alarm is activated if the solenoid valve is not closed within a designated time
period after a fill starts. The solenoid valve can be closed either automatically (the
LN
2
level reaches the STOP FILL sensor) or manually (the stop fill button is pressed)
to stop the timer which activates this alarm. The possible choices for this alarm are
None, 15, 30, 45, 60 minutes, 2 or 3 hours. This alarm does not correct itself until
the fill is stopped (the solenoid closes).
The Sensor Error Alarm can be set through the menu system ( MENU, 3, 3, 2). This
alarm is activated if the control detects a sensor error such as an open sensor. The
possible choices are ENABLE or DISABLE. An open sensor can be confirmed through
the TEST LEVEL SENSORS option in the menu system (
MENU, 2,1).