OM 135 PFS 155C - 315C 31
Control Menu Description
Menu 7, Control Mode
Press the "CONTROL" key under the 'Category Group' and Menu 7 will be displayed. Menus 7 through 18 are the
control menus. All control setpoints and value selections are entered into the MicroTech from these menus. The
default setpoint is indicated under the display column and the range of setpoints or values are indicated in the range
column.
CAUTION
Improper setpoints or values can cause erratic chiller operation and damage to the chiller. Be careful whenever
changing setpoints or values.
This menu is password protected and requires the operator password. The operational mode selected will control the
chiller as described below until the value is changed.
Item
Screen Line Display Field Range
1 1 Mode= 1 Manual Off
Automatic
Manual Enable
Service Testing
Man Cmpr Load= x Stgs 2
2 Comp #1 Mode 1
Comp #1 Stage= x stgs 2
3 Comp #2 Mode 1
Comp #2 Stage= x stgs 2
Manual Off - This mode causes the chiller to stop. If the unit is operating, it will go through a controlled shutdown and
remain off. If the unit is off, it will remain off.
Automatic - This mode allows the chiller to operate according to it's internal MicroTech setpoints. Chiller operation will
start if the remote start/stop input is made, internal time clock calling for operation and front panel switch set to the auto
position.
Manual Enable - This mode allows the chiller to operate if the front panel switch is set to auto. The MicroTech will
ignore the remote start/stop input and the internal time clock schedule.
Service Testing - This mode shuts down the chiller and the chiller is in the manual off mode. Menu 17 (Service Testing)
allows the service technician to check the individual outputs and calibrate the selected transducers.
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