JOHNSON CONTROLS
110
FORM 150.66-NM3
ISSUE DATE: 09/25/2020
SECTION 7 - UNIT CONTROLS
TABLE 14 – OPERATION DATA
* Block of information repeats for each system
LD07381A
Oper Data Key
Leaving & Chilled Liquid Temps
Ambient Air Temperature
System 1 Discharge & Suction Pressure
EEV Only
SYS 1 Suction and SAT Suction Temp
EEV Only
SYS 1 EEV Output & Suction Superheat
R-407c Only
SYS 1 Cooler Inlet Refrigerant Temp
*System 1 Accumulated Hours
*System 1 Accumulated Starts
Load and Unload Timers
Cooling Demand Steps
(Return Chilled Liquid Control Only)
Temp Rate & Temp Error
(Leaving Chilled Liquid Control Only)
Lead System Indicator
Evaporator Pump Contacts & Heater Status
Active Remote Control
Current Feedback One Per Unit
*System 1 Compressors Status
*System 1 Run Time
Sys 1 LLSV & HGSV Status
*System 1 Condenser Fan Stage
Current Feedback One Per System
The fourth message indicates what stage of condenser
fan operation is active. For YCAL0041 to YCAL0071
unless a low ambient kit is added, only stages 1 and 3
will be actually used to cycle the condenser fans.
See the section on Condenser Fan Control
(YCAL0041 – YCAL0071 Chillers) in SECTION 8 -
UNIT OPERATION for more information.
The fth message displays current as sensed by the op-
tional current feedback circuitry. The display reads out
in amps along with the DC feedback voltage from the
module. Current is calculated by:
225A x Actual Volts
5 Volts
Individual displays will be present for each system, if
CURRENT FEEDBACK ONE PER SYSTEM is pro-
grammed under the OPTIONS key. Combined com-
pressor current for each system is displayed.
Oper Data Quick Reference List
The following table is a quick reference list for infor-
mation available under the OPER DATA key.
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