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FORM
3.Status messages indicating:
a.system ready to start
b.system running
c.system coastdown
d.system safety
e.system cycling
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
10.A fused connection through a transformer in the compressor motor starter to provide individual
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