© MASS ELECTRONICS Pty Ltd 2005
Page 3
DS 2.77 - MS5-04 - Microcontroller
August 2013
Parameter 0 - Sensor Calibration
The Display will show the sensor temperature. To oset the
sensor temperature, adjust using the or buttons.
• The range of the Oset is ± 9.9°C
• The factory default setting is 0.0°C
Parameter 1 - Minimum Setpoint
The display will show the Minimum Setpoint to which the
controller can be set.
• The range of the Minimum Setpoint is 0 to 99°C
• The factory default setting is 15°C
Parameter 2 - Maximum Setpoint
The display will show the Maximum Setpoint to which the
controller can be set.
• The range of the Maximum Setpoint is 0 to 99°C
• The factory default setting is 30°C
Parameter 3 - Dead Band
The display will show the Dead Band setting.
• The range of the Dead Band is 0 to 9.9°C
• The factory default is 1.0°C
Parameter 4 - Proportional Band
The display will show the Proportional Band (PB) setting. A PB
setting of 2°C will result in a dierential of 2°C for heating and 2°C
for cooling.
• The range of the Proportional Band is 0 to 9.9°C
• The factory default is 1.0°C
Parameter 5 - Fan Run On Time
The display will show the Fan Run On Time.
This is the period that fan will run for if it is operating in heating
mode and the controller is turned o. This is to remove any
residual heat where electric heating is used.
• The range of the Run On Time is 0 to 99 seconds.
• The factory default setting is 30 seconds.
Parameter 6 - Aer Hours Timer
The display will show the Aer Hours Time.
This is the period the unit will run for if an Aer Hours pulse is
received.
• The range of the Aer Hours Time is 0 to 9.9 hours.
• The factory default setting is 1 hour.
Parameter 7 - Unit Disable Timer
The display will show the Unit Disable Time.
This is the time that the controller must see the Unit Disable
input for before it turns o.
• The range of the Disable Timer is 0 to 99 minutes.
• The factory default setting is 1 minute.
Parameter 8 - Devices Disable
The display will show 4 settings of device disable.
• 0 - None, 1 - Heat, 2 - Cool, 3 - Heat and Cool
• The factory default setting is 3 - Heat and Cool.
Parameter 9 - Device Disable Timer
The display will show the Device Disable Time. This is the time that the
controller must see the device disable input for before it turns o the
specified devices.
• The range of the Device Disable Timer is 0 to 99 seconds.
• The factory default setting is 0 seconds.
Timer Function
The button when pressed will display the time in which the unit
will change state. For example: if the unit is o, the unit will display the
time till the unit will turn on. If the unit is on, it will display the time till it
will turn o.
Continuously pressing the button will increase this time by 10 minutes
until it reaches 24 hours, when it will then roll over and display the
minimum time adjustment. The time is adjustable from 10 minutes to
24 hours. If le for 5 seconds, the display will revert to displaying the
sensed temperature.
Mode Function
The button will switch between Auto, Heat and Cool modes.
In Auto mode, the unit will heat and cool as required to maintain the
setpoint conditions.
In heat mode, the cooling is disabled and the unit can only heat to
maintain set point conditions (winter mode).
In cool mode, the heating is disabled and the unit can only cool to
maintain conditions (summer mode).
Start Up Default Settings
The Microcontroller can be set to start in any mode of operation.
To set the start up default, adjust the Microcontroller to the desired
settings and then press and hold the and buttons for 5
seconds.
The display will become blank indicating that the new settings are
saved.
Factory Set Default Settings
Setpoint 22.5°C (0.0 to 99.9°C)
Operating Mode O (O / On)
Fan Speed High (Low / Medium / High)
A/C Cycle Auto (Auto, Heat, Cool)
