RWB II PLUS MICROPROCESSOR CONTROL
OPERATION
S70-200 OM
Page 3
MICROPROCESSOR CONTROL PANEL
CLEAR
ENTER
STEP
CHANGE
SETPOINT ENTRY
FUNCTION
COMPRESSOR
F1
F3
F4
F2
SILENCE
ALARM
UNLOAD
MANUAL
START
REMOTE
STOP
REMOTE
RUN
AUTO
AUTO
SLIDE VALVE
SLIDE STOP
1
2
3
4
5
6
7
8
*
9
0
+/-
EMERGENCY STOP
MANUAL
LOAD
MANUAL
DECREASE
MANUAL
INCREASE
The following must be read in addi-
tion to the Operation adn Start-up in-
structions in S70-200 IOM before at-
tempting to start or operate the unit.
The RWB II PLUS compressor is controlled by a state-of-
the-art microprocessor control system. The microprocessor
continuously monitors the compressor unit’s condition and
operation. The microprocessor also directs instructions to
the various compressor unit subsystems.
The microprocessor has a membrane switch keyboard.
Pressing the keyboard in the area outlined as a key will cause
that function to be recognized by the microprocessor. The
keyboard has 32 membrane type keys.
In addition to the keyboard, there is an emergency stop but-
ton. Pushing the emergency stop will bypass the computer
and remove all power from the outputs.
This will shut down the compressor motor and all high volt-
age to the compressor auxiliary systems such as the oil
pump and liquid injection solenoid. THE EMERGENCY
STOP BUTTON IS FOR EMERGENCY SHUTDOWN SITU-
ATIONS ONLY and MUST NOT BE USED TO ROUTINELY
SHUT OFF THE COMPRESSOR.
The microprocessor continuously monitors the state of the
battery which maintains setpoints and various other data. If
the battery voltage is low, the message “LOW BATTERY”
will flash in the lower right hand corner of the bottom dis-
play (see S70-200 IOM for description of battery backup).
The microprocessor hardware contains an output watch-
dog circuit. If the microprocessor should fail, this circuit will
disable (turn off) all outputs.
