York YR - Manual (Page 15)

15 YORK INTERNATIONAL
FORM 160.81-EG1
3. Status messages indicating:
a. system ready to start
b. system running
c. system coastdown
d. system safety shutdown-manual restart
e. system cycling shutdown-auto restart
f. start sequence initiated
g. start inhibit
4. The text displayed within the system status and
system details field will be displayed as a color
coded message to indicate severity: red for safety
fault, orange for cycling faults, yellow for warnings,
and green for normal messages.
5. Safety shutdowns enunciated through the display
and the status bar, and consist of system status,
system details, day, time, cause of shutdown, and
type of restart required. Safety shutdowns with a
fixed speed drive will include:
a. evaporator – low pressure
b. evaporator – low pressure – smart freeze
c. evaporator – transducer or leaving liquid probe
d. evaporator – transducer or temperature sensor
e. condenser – high pressure contacts open
f. condenser – high pressure
g. condenser – pressure transducer out of range
h. auxiliary safety – contacts closed
i. discharge – high temperature
j. discharge – low temperature
k. oil – low differential pressure
l. oil or condenser transducer error
m. oil – clogged filter
n. oil – high pressure
o. control panel – power failure
p. watchdog – software reboot
5.1. Safety shutdowns with a Solid State Starter
(LCSSS) will include:
a. shutdown – requesting fault data…
b. high instantaneous current
c. high phase (X) heatsink temperature - running
d. 105% motor current overload
e. motor or starter – current imbalance
f. phase (X) shorted SCR
g. open SCR
h. phase rotation
6. Cycling shutdowns enunciated through the display
and the status bar, and consists of system status,
system details, day, time, cause of shutdown, and
type of restart required. Cycling shutdowns with a
fixed speed drive will include:
a. multiunit cycling – contacts open
b. system cycling - contacts open
c. control panel - power failure
d. leaving chilled liquid - low temperature
e. leaving chilled liquid - flow switch open
f. condenser – flow switch open
g. motor controller – contacts open
h. motor controller – loss of current
i. power fault
j. control panel - schedule
6.1. Cycling shutdowns with a Solid State Starter
(LCSSS) will include:
a. initialization failed
b. serial communications
c. requesting fault data
d. stop contacts open
e. power fault
f. low phase (X) temperature sensor
g. run signal
h. invalid current scale selection
i. phase locked loop
j. low supply line voltage
k. high supply line voltage
l. logic board processor
m. logic board power supply
n. phase loss
7. Security access to prevent unauthorized change
of setpoints, to allow local or remote control of the
chiller, and to allow manual operation of the slide
valve. Access is through ID and password recog-
nition, which is defined by three different levels of
user competence: view, operator, and service.
8. 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 moni-
toring system.
9. The operating program stored in non-volatile
memory (EPROM) to eliminate reprogramming the
chiller due to AC power failure or battery discharge.
Programmed setpoints will be retained in lithium
battery-backed RTC memory for a minimum of 11
years with power removed from the system.
10. A fused connection through a transformer in the
compressor motor starter to provide individual
over-current protected power for all controls.