© MASS ELECTRONICS Pty Ltd 2005
Page 2
DS 2.75 - MS5-01 - Microcontroller
August 2013
Installation
1. Mount in a dry and reasonable clean location free of excessive
vibration.
2. Wire in accordance with INNOTECH connection diagrams and
local bylaws or refer to your local distributor.
Wiring
1. Connect 240VAC supply to the correct terminals on the
controller, observing the correct polarity of the connections.
2. Connect the EARTH to the correct terminals on all units.
3. DO NOT connect 240VAC to the control terminals.
4. Ensure that the wiring between the control station and the
controller is correctly connected. Failure to do so will result in
malfunctioning and may damage either or both units.
5. The maximum wire length between the control station and
controller should not exceed 50 metres. The wiring between
these devices should not be run in parallel with conductors
carrying high current.
Digital Inputs
DI1 Timeclock
The Microcontroller is equipped with a remote timeclock enable
function.
When the time clock input (DI1) is "ON", the Microcontroller will run
in A/C mode.
DI2
After Hours
The Microcontroller is equipped with an After Hours timer.
When a pulse is received on the After Hours input (DI2), the unit will
run in A/C mode for the period set in Program Parameter 6.
If a pulse is received while the Microcontroller is in After Hours mode,
it will toggle off.
DI3
Unit Disable
The Microcontroller is equipped with an AC unit disable function.
If the disable input (DI3) is "ON" for the period set in Program
Parameter 7, the Microcontroller will shut down the Air Conditioning
unit. When the Microcontroller is disabled, the ON/OFF LED will flash
to indicate that the Microcontroller is being overridden.
When the remove disable input is opened, the unit can be restarted
by pressing the A/C button.
DI4
Device Disable
The Microcontroller is equipped with a Heat/Cool disable.
If the remote disable input (DI4) is "ON" for the period set in
Parameter 9, the Microcontroller will shut down the specified A/C
devices (Heat only, Cool only or Heat and Cool) as indicated in
Parameter 8. If an A/C device is being overridden, the corresponding
Mode LED (Heat/Cool) will flash. When the input is turned off, the
unit will restart the A/C devices as required.
When the input is turned off, the unit will restart the A/C devices as
required.
Analogue Outputs
AO1
Chilled Water Valve
The Microcontroller is equipped with an output for a chilled water
valve. When the Microcontroller is in cooling mode, the analogue
output will vary linearly from 0-10V over the range of the PB
(Parameter 4).
Digital Display
The digital display will show the following error codes to assist with
fault finding.
• Display Reads "99.9"
This indicates either a faulty sensor or faulty sensor
cabling.
• Display Reads "HLP"
This indicates that communication between the Control
Station and Controller is not operating.
First check the interconnecting cabling and if this is OK, contact your
local Innotech Distributor.
Adjustable Parameters
Jumper Settings on the Control Station
Jumper #1 (JP1 Rev)
Not Used.
Jumper #2 (JP2 H/C)
Not Used.
Jumper #3 (JP3 Fan)
This jumper is used to select continuous fan operation or fan cycles
with heating.
When the link is closed, the fan runs continuously on cooling and
cycles with heating.
Jumper settings will not take effect until supply power is reset to
the controller.
Program Functions on the Control Station
All variable settings for the Microcontroller are adjusted at the
Control Station.
Programming Mode
To enter Programming Mode, depress and hold the
and
buttons for 5 seconds. The display will become blank indicating that
you are in the Programming Mode. Release both keys and the display
will show parameter 0.
While in the programming mode, the following buttons are active:
Change to the next parameter
Increase the current parameter value
Decrease the current parameter value
To Exit the Programming Mode, depress the
and
buttons
and the new setting will be saved.
This product should only be installed by qualified personnel.
