4–33
T-340
Cd53
Automatic Set point
Change Mode
Parameter Selection
ASC-mode:
Cd53 increments of (1 day)_(1hr), Display: default “0_0 “
“done” mm-dd this will be display is ASC has completed
“ASC” value “On” “OFF” Display /Select: default “OFF“
“nSC” value “1 - 6” (This is the value “n” for the subsequent entries).
“SP (n-1)” value °C / °F on 0.1 degree increments Display/Select: default
“10.0°C“
“DAY (n-1)” value “1 - 99” increments of 1 Display/Select: default “1“
“SP (n)” value °C / °F on 0.1 degree increments Display/Select: default “10.0°C
Initially Cd53 will display current count down timer increments of (1 day)_(1hr),
default “0_0
Pressing the ENTER key will take the interface down into a hierarchy of param
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eter selection menus, (mode, act, treat, days, probe and spnew setting). Press
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ing the ENTER key in any of the parameter selection menus selects the currently
displayed parameter and causes the interface to descend into the next parame
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ter selection menu. All parameter selection menus alternate between a blank dis
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play and the current selection in the right hand display.
Pressing the CODE SELECT key in a selection menu cancels the current selec
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tion activity and ascends back up to the next higher selection menu (or to Cd53
display mode if that is the next higher).
If the operator does not press any key for five seconds the interface reverts to
normal system display and the current selection menu is cancelled, but any pre
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viously committed changes are retained.
Available parameters and parameter ranges are a function of configuration op
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tions and previously selected parameters as indicated above.
Parameter with the exception of “ASC” may not be altered if Cd53 is re-entered
if “ASC” is “On”. When ASC has completed including reaching the last setpoint
“done” on the left display and the MONTH DAY of completion on the right display
will be displayed as the second entry in the menu. Turning ASC off clears this
entry. This action also resets Cd53 to initial time remaining. ASC must then be
turned on to view or modify the additional parameters.
Whenever any auto pretrip test or Trip Start is initiated, ASC mode goes to OFF.
Display Only Functions
- Cd54 through Cd58 are display only functions.
Cd54
Suction Port Superheat
/ Electronic Expansion
Valve Status
Reading for evaporator superheat (suction temperature minus suction saturation
temperature as calculated from suction pressure) is shown on the right display.
Press the ENTER key at Cd54 to show reading for EEV position (in %) on left
display.
Cd55
Discharge Superheat
Cd55 will display discharge superheat (discharge temperature minus discharge
saturation temperature as calculated from discharge pressure) values in C /F as
calculated by the discharge temperature minus the discharge saturation tem
-
perature as calculated from discharge pressure. “-----” will be displayed if selec
-
tion is not valid.
Table 4–5 Controller Function Codes
Code
Title
Description
