York YK Manual page 107

Guide Specifications (Cont'd)
JOHNSON CONTROLS
11. VSD – low phase A, B, C inverter heat-sink temp
12. VSD – low converter heat-sink temperature
13. VSD – pre-charge – low DC bus voltage
14. VSD – logic board processor
15. VSD – run signal
16. VSD – serial communications
(Filter Option Only)
1. Harmonic filter – logic board or communications
2. Harmonic filter – high DC bus voltage
3. Harmonic filter – high phase A, B, C current
4. Harmonic filter – phase locked loop
5. Harmonic filter – pre-charge – low DC bus voltage
6. Harmonic filter – DC bus voltage imbalance
7. Harmonic filter – 110% input current overload
8. Harmonic filter – logic board power supply
9. Harmonic filter – run signal
10. Harmonic filter – DC current transformer
11. Harmonic filter – DC current transformer
I. Security access to prevent unauthorized change of setpoints, to allow local or remote
control of the chiller, and to allow manual operation of the pre-rotation vanes and oil
pump. Access shall be through ID and password recognition, which is defined by three
different levels of user need: view, operator, and service.
J. Trending data with the ability to customize points of once every second to once every
hour. The panel shall trend up to 6 different parameters from a list of over 140, without
the need of an external monitoring system.
K. The operating program stored in non-volatile memory (EPROM) to eliminate repro-
gramming the chiller due to AC power failure or battery discharge. Programmed
setpoints shall be retained in lithium battery-backed RTC memory for a minimum of 10
years with power removed from the system.
L. A fused connection through a transformer in the compressor motor starter to provide
individual over-current protected power for all controls.
M. A numbered terminal strip for all required field interlock wiring.
N. An RS-232 port to output all system operating data, shutdown/cycling message, and a
record of the last 10 cycling or safety shutdowns to a field-supplied printer. Data logs
to a printer at a set programmable interval. This data can be preprogrammed to print
from 1 minute to 1 day.
FORM 160.75-EG1 (519)
107