TC 816 Operation Manual
THERMON…The Heat Tracing Specialists
®
Page 18 of 42
Operation Manual 0503 E TC 816
3.6.5
Column:
ALARM
This column shows:
•
In the
CONTROLLER
- line (controller-Zones 1 through 16):
-OK.-
: No
alarm
condition
-L-
:
Low temperature alarm condition
Measured temperature dropped below the LO-ALARM set point (parameter P01)
-H-
:
High temperature alarm condition
Measured temperature exceeded the HI-ALARM set point (parameter P02)
-DEV-
: DEViation
temperature alarm condition
Trips
in
case
of:
- Measured temperature dropped below the value:
controller temperature set point - DEV-ALARM set point (parameter P03)
- Measured temperature exceeded the value:
controller temperature set point + DEV-ALARM set point (parameter P03)
-I-
:
Load current alarm condition
Trips
in
case
of:
- The MCB/RCD AL auxiliary contacts are wired to the digital inputs of the AF TOE
Tracing Output module for Electronic relays and parameter P05 enables MCB/RCD
monitoring.
- The AF TIC Tracing Input module for load Current is installed and a alarm condition
in the
CURRENT
-line of the TCD 01 display occurs.
-E-
:
Sensor alarm condition
Trips
in
case
of:
- Short circuited RTD input on AF TIT Tracing Input module for Temperature
- Open RTD input on AF TIT Tracing Input module for Temperature
-com-
: Communication
alarm
condition
The TCD 01 tracing control display can not access the measure controller
value or set point through the RS 485 data communication bus.
-OFF-
:
Alarm condition monitoring disabled
This situation occurs if the heat tracing circuit is set to manual or OFF
(parameter
P06)
•
In the
LIMITER
-line (limiter-Zones 1 through 16):
-OK.-
: No
alarm
condition
-H-
:
High temperature alarm condition
Measured temperature exceeded the limiter set point
-com-
: Communication
alarm
condition
The TCD 01 tracing control display can not access the measure controller
value or set point through the RS 485 data communication bus.
-OFF-
:
Alarm condition monitoring disabled
This situation occurs if the heat tracing circuit is set to manual or OFF
(parameter
P06)
