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www.DaikinApplied.com 55
ED 15103-6 • MICROTECH III WSHP UNIT CONTROLLER
BACnet Commissioning and
Device Management
The Network “Wink” Command
The BACnet communication module implements a unit
identification mode command to the unit controller by using
the BACnet “ReinitializeDevice” request, with a Cold or Warm
Start request handle, and a password of “wink” (all lower case).
The “wink” unit identification function allows verification of an
individual unit network address without opening the unit access
panels. The Wink command can be used during all operating
and non-operating (ex. Alarm) modes except for the following
conditions:
• Brownout Mode
• Emergency Shutdown
• Defrost process
Upon receiving a wink command from a network management
node, the unit controller exhibits the following identification
sequence (all occur simultaneously):
•
Room Sensor LED: flashes ON 3 seconds, then OFF 3
seconds for 15 total seconds, unless an alarm condition
exists.
• Fan: the fan turns off for 5 seconds then on 5 seconds,
then off again for 5 seconds.
Several parameters are used only for maintenance and testing.
A network management tool such as VTS is typically used to
issue the network commands. This section describes the use
of these network parameters that apply to the heat pump:
• DeviceCommunicationControl – Disable
• DeviceCommunicationControl - Enable
• ReinitializeDevice (Reset)
• Network “Wink” Command
DeviceCommunicationControl - Disable
The purpose of this command is to reduce network traffic
for diagnostic testing of the MS/TP network. When the
communication module receives a network command to
disable communication, it stops communicating fan coil unit
information to the network. An optional time may be specified
for how long to suspend communications. The unit continues
to operate during the Disabled state.
DeviceCommunicationControl - Enable
When the communication module receives a network
command to enable communication, unit controller network
communication is restored.
ReinitializeDevice (Reset)
When the communication module receives a network
ReinitializeDevice command, it performs the following:
1. Sends a command to the unit controller to perform a
warm reset, maintaining non-volatile memory.
2. Resets the communication module.
If a warm reset is requested, the communication module’s non-
volatile memory is maintained. If a cold reset is requested,
then the communication module’s non-volatile memory is set to
the factory default values.
NOTE:
The password required to Reinitialize Device is
“McQuay” or “MicroTech.” The password “MicroTech”
is supported for the following unit types:
• HP0 software v3.2 and newer
• HP2 software v6.1 and newer
• HP3 all software versions
for a description of which WSHP models
correspond to HP0, HP2, and HP3.
A cold reset can also be performed by the following button
sequence on the BACnet communication module.
1. Press and hold the button labeled “Default.”
2. Momentarily press the “Reset” button.
3.
The four LED indicators flash briefly and then begin
sequencing on starting with LED D1.
4. Release the “Default” button when all four LED indicators
are on.
5. The communication module will then clear the memory to
default settings and reset.
