Daikin MicroTech III Operation And Maintenance Manual

OM 1239 9 www.DaikinApplied.com
CAUTION
The MicroTech III circuit board incorporates static sensitive
devices. A static charge from touching the device can damage the
electronic components. To help prevent damage during service,
use static discharge wrist straps.Static discharge wrist straps are
grounded to the heat pump chassis through a 1 Mohm resistor.
Replacing a MicroTech III
circuit board:
1. Connect wrist strap to unit.
2. Remove faulty board and place on static protected
surface.
3. Remove replacement board from static protected
bag.
Note: Do not touch circuit board; hold by edges.
4. Holding board in grounded hand, install board in
unit.
5. Insert faulty board in empty static bag for return.
Initial power-up
Pre start check list:
A random start delay time between 300 and 360 seconds
is generated at power up.
Figure 5: Location of configuration jumpers on the
MicroTech III control board
Note: Table 6 are the settings of the hardware conguration jumpers that are read when the controller is powered.
Any changes to the jumper settings require cycling power to the controller or sending a controller a reboot
command through the network communications.
Table 6: MicroTech III controller configuration jumper settings
Baseboard Description Jumper(s) Jumper Setting Function
Normal / Test Mode JP1
Open Normal Operation
Shorted Service / Test Mode
Fan Operation JP2
Open Continuous Fan Operation (On), when not operating in the unccupied mode.
Shorted Cycling Fan Operation (Auto)
Loop Fluid
JP3
(see warning)
Open Water Loop Fluid - Water freeze protection (factory default setting)
Shorted Glycol Loop Fluid - Systems with anti-freeze protection
Freeze Fault Protection JP4
Open None
Shorted Freeze fault protection enabled
Room Sensor Setpoint
Potentiometer Range
JP5
Open Short Range: -5 to +5 ºF (-2.78 to +2.78 ºC)
Shorted Long Range: 55 to 95ºF (12.78 to 35ºC)
Thermostat / Room Sensor JP6
Open Thermostat Control
Shorted Room Sensor Control
Compressor Availability JP7 & JP8
JP7 Open
Both Compressors Available (default)
JP8 Open
JP7 Shorted
One Compressor Available
JP8 Open
JP7 Open
No Compressors Available
JP8 Shorted
WARNING
Jumper JP3 is factory provided in the open position. Extended range units require freeze protection down to 15 degrees. Jumper JP3 must
be eld congured.
MICroteCh III unIt Controller

Daikin MicroTech III Specifications

General

Brand	Daikin
Model	MicroTech III
Category	Controller
Language	English