Specifications

53JOHNSON CONTROLS
FORM 160.80-EG1 (511)
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 - high temperature
l. Oil - low differential pressure
m. Oil - low differential seal pressure
n. Oil or condenser transducer error
o. Oil - clogged lter
p. Oil- high pressure
q. Oil - separator - low level
r. Control panel - power failure
s. Watchdog - software reboot
5.1. Safety shutdowns with a Solid State Starter (LCSSS)
shall 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 consisting of system status,
system details, day, time, cause of shutdown, and
type of restart required.
Cycling shutdowns with a xed speed drive shall
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 - ow switch open
f. Condenser - ow 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)
shall 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 prerota-
tion vanes and oil pump. Access shall be through ID
and password recognition, which is dened 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 monitoring
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 shall be retained in lithium
battery-backed RTC memory for a minimum of 11
years with power removed from the system.