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EXAMPLE 11 — OVERRIDE DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight CONTROL ALGORITHM STATUS . 4. Press SELECT . 5. Scroll down to highlight OVERRIDE . 6. Press SELECT . DESCRIPTION Comp Motor Winding Temp Comp Motor Temp Override Condenser Pressure Cond Press Override Evaporator Refrig Temp Evap Ref Override Temp Comp Discharge Temp Comp Discharge Alert Comp Thrust Brg Temp Comp Thrust Brg Alert Actual Superheat Superheat Required Condenser Refrig Temp POINT MTRW mt_over CRP cp_over ERT rt_over CMPD cd_alert MTRB tb_alert SUPRHEAT SUPR_REQ CRT Table 2 — CVC Display Data (cont) STATUS UNITS –40-245 150-200 0-420 90-180 –40-245 2-45 –40-245 125-200 –40-245 165-185 –20-99 6-99 –40-245 DEG F DEG F PSI PSI DEG F DEG F DEG F DEG F DEG F DEG F ^F ^F DEG F NOTE: All variables with CAPITAL LETTER point names are available for CCN read operation; forcing shall not be supported on maintenance screens. EXAMPLE 12 — LL_MAINT DISPLAY SCREEN To access this display from the CVC default screen: 1. Press MENU . 2. Press SERVICE . 3. Scroll down to highlight CONTROL ALGORITHM STATUS . 4. Press SELECT . 5. Scroll down to highlight LL_MAINT. 6. Press SELECT . DESCRIPTION Lead Lag Control LEADLAG: Configuration Current Mode Load Balance Option LAG START Time LAG STOP Time Prestart Fault Time Pulldown: Delta T / Min Satisfied ? LEAD CHILLER in Control LAG CHILLER: Mode Run Status Start/Stop Recovery Start Request STANDBY CHILLER: Mode Run Status Start/Stop Recovery Start Request Spare Temperature 1 Spare Temperature 2 POINT leadlag llmode loadbal lagstart lagstop preflt pull_dt pull_sat leadctrl lagmode lagstat lag_s_s lag_rec stdmode stdstat Std_s_s std_rec SPARE_1 SPARE_2 STATUS UNITS NOTE 1 NOTE 2 0/1 2-60 2-60 2-30 x.xx 0/1 0/1 NOTE 3 NOTE 4 NOTE 5 0/1 NOTE 3 NOTE 4 NOTE 5 0/1 –40-245 –40-245 DSABLE/ENABLE MIN MIN MIN ^F NO/YES NO/YES NO/YES NO/YES DEG F DEG F NOTES: 1. DISABLE, LEAD, LAG, STANDBY, INVALID 2. DISABLE, LEAD, LAG, STANDBY, RECOVERY, CONFIG 3. Reset, Off, Local, CCN 4. Timeout, Ready, Recycle, Prestart, Startup, Ramping, Running, Demand, Override, Shutdown, Trippout, Pumpdown, Lockout 5. Stop, Start, Retain 6. All variables with CAPITAL LETTER point names are available for CCN read operation; forcing shall not be supported on maintenance screens. 27PDF Image | 19XR,XRV Hermetic Centrifugal Liquid Chillers 50/60 Hz With PIC II Controls and HFC-134a
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