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3.8.3.3 d-code:
The d-code shows the current operation state of the unit.
Example d101
:
• This code "d101" will be displayed when the total time above set point +1˚C reaches 1 hour.
The code "d102" will then be displayed when the total time above set point +1˚C reaches 2 hours.
Example d-21
:
• This code "d-21" will be displayed when the total time below set point –2˚C reaches 1 hour.
The code "d-22" will then be displayed when the total time below set point –2˚C reaches 2 hours.
SP–2˚C
SP–1˚C
SP
SP+1˚C
SP+2˚C
SP+3˚C
t
1
=6 hours
t
2
=4 hours
t
3
=2 hours
t
4
=2 hours
t
6
=1 hours
t
5
=3 hours
Point A
Example : If inside temperature was recorded above graph, controller shows the following "d code"
when user check the code at "point A"
d106 (above se1˚C for 6 hours)
d204 (above se2˚C for 4 hours)
d302 (above se3˚C for 2 hours)
d-22 (below setpoint –2˚C for 2 hours)
d-13 (below setpoint –1˚C for 3 hours)
d-11 (below setpoint –1˚C for 1 hour)
Figure7
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