Daikin MicroTech III, Руководство по эксплуатации и техническому обслуживанию

Страница: 6 / 28

OM 931-6 • MicroTech III Unit Controller for WSHP 6 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.
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 2: Location of Configuration Jumpers on the Base
Board Controller
M
ICro
t
eCh
III u
nIt
C
ontroller
Table 2: 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)
Alarm "A" Terminal Output Polarity JP4
Open Fault de-energizes alarm output to 0VAC.
Shorted Fault energizes alarm output to 24VAC.
Room Sensor Setpoint
Potentiometer Range
JP5
Open Short Range: -3 to +3 ºF (-1.67 to +1.67 ºC)
Shorted Long Range: 55 to 95 ºF (12.78 to 35 ºC)
Thermostat / Room Sensor JP6
Open Thermostat Control
Shorted Room Sensor Control
Not Used JP7 Open –
Not Used JP8 Open –
WARNING
Proper antifreeze/water solution is required to minimize the
potential of fluid freeze-up. Jumper JP3 is factory set for water
freeze protection with the jumper open. Operation with anti-
freeze protection requires JP3 to be field configured for the
jumper closed. If unit is employing a fresh water system (no
anti-freeze protection), it is extremely important that JP3 jumper
setting remains in the open position (factory default setting) in
order to shut down the unit at the appropriate water temperature
to protect your heat pump from freezing. Failure to do so can
result in unit damage and fluid leaks.”