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Table 2 — LID Display Data (cont)
EXAMPLE 13 — MAINTENANCE (MAINT03) DISPLAY SCREEN
To access this display from the LID default screen:
1. Press MENU
.
2. Press SERVICE
.
3. Scroll down to highlight CONTROL ALGORITHM STATUS.
4. Press SELECT
.
5. Scroll down to highlight MAINT03.
6. Press SELECT
.
DESCRIPTION RANGE/STATUS UNITS REFERENCE POINT NAME
SURGE/HGBP ACTIVE ? NO/YES
Active Delta P 0-200 (0-1379) PSI (kPa) dp a
Active Delta T 0-200 (0-111) DEG F (DEG C) dt a
Calculated Delta T 0-200 (0-111) DEG F (DEG C) dt c
Surge Protection Counts 0-12 spc
NOTE: Override is not supported on this maintenance screen. Only values with capital letter reference point names are variables available for read
operation.
EXAMPLE 14 — MAINTENANCE (MAINT04) DISPLAY SCREEN
To access this display from the LID default screen:
1. Press MENU
.
2. Press SERVICE
.
3. Scroll down to highlight CONTROL ALGORITHM STATUS.
4. Press SELECT
.
5. Scroll down to highlight MAINT04.
6. Press SELECT
.
DESCRIPTION RANGE/STATUS UNITS REFERENCE POINT NAME
LEAD/LAG: Configuration DISABLE,LEAD,LAG,STANDBY, INVALID leadlag
Current Mode DISABLE,LEAD,LAG,STANDBY, CONFIG llmode
Load Balance Option DISABLE/ENABLE loadbal
LAG Start Time 0-60 MIN lagstart
LAG Stop Time 0-60 MIN lagstop
Prestart Fault Time 0-30 MIN preflt
Pulldown: Delta T/Min x.xx ⌬ DEGF(⌬DEG C) pull dt
Satisfied? No/Yes pull sat
LEAD CHILLER in Control No/Yes leadctrl
LAG CHILLER: Mode Reset,Off,Local,CCN lagmode
Run Status Timeout,Recycle,Startup,Ramping,Running
Demand,Override,Shutdown,Abnormal,Pumpdown
lagstat
Start/Stop Stop,Start,Retain lag s s
Recovery Start Request No/Yes lag rec
STANDBY CHILLER: Mode Reset,Off,Local,CCN stdmode
Run Status Timeout,Recycle,Startup,Ramping,Running
Demand,Override,Shutdown,Abnormal,Pumpdown
stdstat
Start/Stop Stop,Start,Retain std s s
Recovery Start Request No/Yes std rec
NOTES:
1. Values on this screen cannot be ‘‘forced’’ (that is, changed by an operator, from the LID or from any other device [such as a CCN terminal]).
2. ⌬ = delta degrees.
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