RXB PLUS ROTARY SCREW COMPRESSOR UNITS S70-101 IOM
Page 17
OPERATION
pressed, automatic (AUTO MODE) when Auto Cycle has
been activated, remote (RMT MODE) when the [REMOTE]
key has been pressed, or off (OFF MODE).
RECYCLE DELAY - A Recycle Delay message indicates
that the compressor has started and has shut down within
the time delay setpoint period. The Recycle Delay will pre-
vent the compressor from starting until the delay time ex-
pires and is intended to prevent damage to the compressor
motor from successive restarts. During Recycle Delay, the
microprocessor will alternatively flash “RECYCLE DELAY”
and the remaining delay time in minutes.
NOTE: Consult Motor Manufacturer for the recom-
mended duration of the Recycle Delay.
If the [RUN] key is pushed while
the unit is in Recycle Delay, the
compressor will start at the end of
the delay period.
OPERATING DISPLAY, Page 2
V RATIO - Volume Ratio is the ratio selected by the micro-
processor to provide the highest efficiency at any given suc-
tion and discharge pressure condition. Immediately below
this, an information space has been provided to indicate
whether V ratio is in the automatic (AUTO) or the manual
(MAN) mode.
SV POS - Slide valve position is displayed as a percentage.
This percentage reflects the mechanical position of the slide
valve and does not reflect the percentage of full load opera-
tion. Immediately below this information, space has been
provided to indicate whether SV Pos is in the automatic
(AUTO), manual (MAN), or remote (RMT) mode. The micro-
processor will control this function in the automatic mode.
To the right of the mode indicator, two other messages may
appear:
L - Indicates Slide Valve loading.
U - Indicates Slide Valve unloading.
PUMP (Optional) - Pump displays the current status of the
oil pump. The display will read ON or OFF whenever the
HAND-OFF-AUTO switch is selected to AUTO and the com-
pressor is running.
% FLA - Percent Full-Load Amps displays the percentage
of the drive motor, full-load amperage rating that the motor
is currently using.
SEP - Separator displays the oil separator temperature in
degrees Fahrenheit.
HTR - Heater displays the condition of the oil separator
heater(s), indicating ON or OFF.
FORCED UNLD - A Forced Unload message indicates that
the percentage of motor, full-load amps has exceeded the
maximum limit and the microprocessor is unloading the com-
pressor until the percentage FLA falls back to normal limits.
SETPOINTS DISPLAY *
SETPOINTS PAGE 1A ID=[33] [03-01-89]
Cap. Control-----[14.3 hg] Thu [15:33:36]
Lo Suct Cutout -[20.0 hg] Baud----[ 2400]
Lo Suct Alarm -- [18.0 hg] Recy.Delay-[30]
SETPOINTS PAGE 1B
Dead Band--[/./#]
Prop. Band--[/ / %]
Cycle Time--[/ / sec]
LOW % FLA---[/ / / %]
SETPOINTS PAGE 2 MLC Stop LD-[095%]
CT Factor-[078] MLC Force ULD[100%]
Aux1[Alarm] [NO] Hi Disch Cutout-[050 g ]
Aux2[Shutd] [NO] Hi Disch Alarm—[045 g ]
SETPOINTS PAGE 3 HIGH STAGE RXB NP-22
PB-[10% DB-[1.0 #]
Oil Heater----- [113F] Liq Inj Con ------- [122F]
Hi Disch Cut - [212F] Hi Disch Alarm - [194F]
SETPOINTS PAGE 4
Hi Oil Temp Cutout -- [167F] Alarm -- [158F]
Lo Oil Temp Cutout -- [49F] Alarm -- [58F]
Lo Oil Press. Cutout -- [005] Alarm -- [010]
The information furnished by these displays is as follows:
SETPOINTS DISPLAY, Page 1A:
CAP CONTROL - The Capacity Control setpoint, reported
in pounds per square inch gauge (g) or inches of mercury
(hg), controls the loading and unloading of the compressor
when Capacity is in the automatic (AUTO) mode.
LO SUCT CUTOUT - The Low Suction Pressure Cutout,
reported in pounds per square inch gauge (g) or inches of
mercury (hg), will shut down the compressor if the suction
pressure drops to this limit or lower, for 90 seconds or longer.
LO SUCT ALARM - The Low Suction Pressure Alarm, re-
ported in pounds per square inch gauge (g) or inches of
mercury (hg), will trigger a prealarm if the suction pressure
drops to this limit or lower.
ID - The ID number is a programmable identification code
used
in telecommunications to access a specific compressor.
DATE - The Date displays the current date in the following
format: Month - Day - Year.
DAY - Day will display the current day of the week.
TIME - The Time displays the current time in the following
format: Hours - Minutes - Seconds. The time is in 24:00:00
hour clock format.
BAUD - Shows the baud rate of the RS422 communication
port. Both ports are configured as follows: word = 8 bit, par-
ity = none or even, stop = 1 bit. The communications port is
programmable from 300 to 19200 baud.
RECY. DELAY - The Recycle Delay displays the current
recycle delay setpoint in minutes. NOTE: Consult the mo-
tor manufacturer for recommended setpoint.
*Display for illustrative purposes only.
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