Microtech Ii Controller; Controller Software Version; General Description - Daikin WGZ030DW Operating And Maintenance Manual

MicroTech II Controller

Controller Software Version

This manual is based on software version WGZD20102F. The "02F" is the version descriptor. The
version installed in a unit can be viewed by pressing the MENU and ENTER keys simultaneously, then
pressing MENU to return to the regular menu screen.

General Description

The MicroTech II controller's state-of-the-art design will not only permit the chiller to run more
efficiently but will also simplify troubleshooting if a system failure occurs. Every MicroTech II controller
is programmed and tested prior to shipment to assist in a trouble-free start-up. The MicroTech II
controller can be used to cycle fans on remote air-cooled condensers for head pressure control when the
setpoint Water Cooled=N is selected in one of the setpoint menu screens. Water Cooled=Y sets the chiller
for operation with the water-cooled condenser.
Operator Friendly
The MicroTech II controller menu structure is separated into three distinct categories, which provide the
operator or service technician with a full description of
1. current unit status,
2. control parameters (setpoints)
3. alarms. Security protection prevents unauthorized changing of the setpoints and control parameters.
The MicroTech II controller continuously performs self-diagnostic checks, monitoring all system
temperatures, pressures and protection devices, and will automatically shutdown a compressor, a
refrigerant circuit or the entire unit should a fault occur. The cause of the shutdown and date stamp are
retained in memory and can be easily displayed in plain English for operator review, which is an
extremely useful feature for troubleshooting. In addition to displaying alarm diagnostics, the MicroTech
II chiller controller also provides the operator with a warning of pre-alarm conditions.
Staging
The four scroll (or six) compressors are staged on and off as a function of leaving chilled water
temperature, number of starts and run-hours. See Sequence of Operation.
Equipment Protection
The unit is protected by alarms that shut it down and require manual reset, and also by limit alarms that
limit unit operation in response to some out-of-limit condition. Shut down alarms activate an alarm signal
that can be wired to a remote device.
Unit Enable Selection
Enables unit operation from local keypad or digital input
Unit Mode Selection
Selects standard cooling, ice, glycol, or test operation mode
OMM 1130-2 17