Suppliers of Air Conditioning & Refrigeration
Control Equipment
Unit 25/205-213 Port Hacking Rd Miranda 2228
Sydney Australia
Phone: +61 2 9522 0334 Fax: +61 2 9522 0337
www.mjbcontrols.com.au sales@mjbcontrols.com.au
User Manual for the
ACCS-1 Digital 7 Day Programmable Thermostat with Zone Control
Congratulations on your purchase of the MJB ACCS-1. This Air conditioning Control System has been
designed and manufactured in Australia to provide maximum system efficiency, whilst maintaining an
easy to use user interface. The ACCS-1 will provide you with years of trouble free operation, and is
covered by a 12-month warrantee against faulty components and workmanship.
Contents:
Advanced Features Page 2
Wall Controller Functions
Setting the time Page 3
Setting the date Page 4
System Operation
Manual Operation Cooling Page 4
Manual Operation Heating Page 4
Auto Operation Page 4
Fan Only Operation Page 4
Setting 7 Day programmable time clock Page 5
Trouble Shooting Page 6
ACCS-1_UM v1 Copyright © 2005 MJB Controls Pty Ltd All Rights Reserved
Proudly Designed and Manufactured in Australia Page 1 of 6
Advanced Features:
Auto-Restart After Power Failure:
Should a power failure occur whilst the air conditioning system is running, the controller will restart
the air conditioner in the same mode when the power is restored as it was prior to the power failure.
Temperature Display:
The ACCS-1 is capable of displaying the set point or the room temperature on the LCD display. The
factory default is to display set point temperature. In this mode the set point temperature is displayed
only. When room temperature is selected, the room temperature is shown until the temperature up or
down buttons is pressed then the set point temperature will be shown for 15 sec. After the 15 seconds
the display reverts back to room temperature.
Integrated Zoning System:
The ACCS-1 integrated zoning system is capable of controlling up to 4 zones as standard. This allows
the occupant full control, of which area or areas of the house or office that they wish to air condition,
therefore reducing power consumption and hence operating costs over time.
Auto Defrost Function: (Heating Mode)
At certain outdoor conditions (low temperature) there may be a build up frost on the outdoor heat
exchanger. This gradual build up of frost reduces the performance of the air conditioner. The ACCS-1
detects this frost build up and will automatically activate the defrost mode.
Hot Start Function: (Heating Mode, Optional)
When the air conditioning system cycles on in heating mode, the indoor fan is delayed for a short
period of time, this allows the indoor heat exchanger to warm up before the air flow starts, thus
preventing cold drafts. The hot start feature also activates itself when the system finishes defrosting,
enhancing occupant comfort.
7-Day programmable time clock:
The ACCS-1 is equipped with a programmable 7-Day time clock. This feature is used when you might
wish to turn on and off the Air Conditioning System at the same time during multiple days of the week.
For example, you might wish to have your house cool by the time you get home from work. So instead
of leaving it on all day or coming home to a hot house, you just program the time into the wall
controller of the ACCS-1 to turn it on at say 5 PM so your house is at the correct temperature for when
you get home. You could also set it to turn the Air Conditioning system off at say 1 AM when the
outside temperature has reduced and cooling is no longer needed. You can do this every day of the
week, Monday to Friday only or Weekends only (Saturday and Sunday). Obviously, if it’s cold outside
the reverse is true.
ACCS-1_UM v1 Copyright © 2005 MJB Controls Pty Ltd All Rights Reserved
Proudly Designed and Manufactured in Australia Page 2 of 6
Wall Controller Functions:
1
23
4
56
ON
FAN
OFF
ZONE 1
ZONE 2
CANCEL
7
8
MODE
ENTER
PROGRAM
ZONE 3
ZONE 4
DOWN
9
10
UP
MJB
C o n t r o l s
(1) Turns unit On or Off (2) Adjusts fan speed. Also used as Cancel button
in Programming Mode.
(3) Adjusts mode, e.g. Heating, Cooling, Fan only
etc. Also used as Enter button in Programming
Mode.
(5) Use to decrease temperature. Also used to
decrease settings or menus in Program Mode
(7) Press to activate Zone 1 (8) Press to active Zone 2
(9) Press to activate Zone 3 (10) Press to activate Zone 4
Please note that the Air Conditioning System must be turned on
to set any of the following options:
(4) Places unit in Program Mode.
(6) Use to increase temperature. Also used to
increase settings or menus in Program Mode.
Setting the Time:
1) Press the PROGRAM button to place the wall controller in program mode.
2) Press the UP / DOWN buttons until the wall controller says SET CLOCK.
3) Press the ENTER button to enter clock set mode.
4) Press the UP / DOWN buttons the set the desired hour then press ENTER.
5) Press the UP / DOWN buttons to set the desired minutes then press ENTER.
6) Press the UP / DOWN buttons to set the seconds to zero then press ENTER.
7) The time has now been set. Press the PROGRAM button to save the new
settings or press the UP/DOWN buttons to continue.
ACCS-1_UM v1 Copyright © 2005 MJB Controls Pty Ltd All Rights Reserved
Proudly Designed and Manufactured in Australia Page 3 of 6
Setting the Date:
1) Press the PROGRAM button to place the wall controller in program mode.
2) Press the UP / DOWN buttons until the wall controller says SET DATE.
3) Press the ENTER button to enter date set mode.
4) Press the UP / DOWN buttons until the desired day then press ENTER
5) Press the UP / DOWN buttons until the desired month then press ENTER.
6) Press the UP / DOWN buttons until the desired year then press ENTER.
7) The date has now been set. Press the PROGRAM button to save the new
settings.
The correct weekday will be automatically set, e.g. MONDAY during the above
procedure. If the day is incorrect please recheck, DAY, MONTH AND YEAR.
Manual Operation: (Cooling)
1) Press the ON button.
2) Press the MODE button until COOL is shown on the LCD.
3) Press the UP / DOWN buttons to the desired temperature setting.
4) Press the FAN button to the desired fan speed (Hi, Mid, Low) or alternatively
set the fan to AUTO mode if you would like the ACCS-1 to adjust the fan
speed for you.
5) Press the OFF button to turn the system off.
Manual Operation: (Heating)
1) Press the ON button.
2) Press the MODE button until HEAT is shown on the LCD.
3) Press the UP / DOWN buttons to the desired temperature setting.
4) Press the FAN button to the desired fan speed (Hi, Mid, Low) or alternatively
set the fan to AUTO mode if you would like the ACCS-1 to adjust the fan
speed for you.
5) Press the OFF button to turn the system off.
Auto Operation:
(Automatically changes between Cooling and Heating to maintain
set temperature).
1) Press the ON button.
2) Press the MODE button until AUTO is shown on the LCD.
3) Press the UP / DOWN buttons to the desired temperature setting.
4) Press the FAN button to the desired fan speed (Hi, Mid, Low) or alternatively
set the fan to AUTO mode if you would like the ACCS-1 to adjust the fan
speed for you.
5) Press the OFF button to turn the system off.
Fan Only Operation: (Air circulation only)
1) Press the ON button.
2) Press the MODE button until COOL HEAT AUTO is NOT showing on the
LCD.
3) Press the FAN button to set the desired fan speed (Hi, Mid, Low).
4) Press the OFF button to turn the system off.
ACCS-1_UM v1 Copyright © 2005 MJB Controls Pty Ltd All Rights Reserved
Proudly Designed and Manufactured in Australia Page 4 of 6
Setting 7-Day programmable time clock:
1) Press the ON button.
2) Press the PROGRAM button to place the wall controller in program mode.
3) Press the UP / DOWN buttons until the wall controller says SET TIMER.
4) Press the ENTER button to enter timer mode.
5) T1CLR will now be showing on the display, this means TIMER1 is clear (no
settings, if there was a previous setting then this will be displayed).
6) Press the DOWN button until DAY1 shows on the display. From here you can
choose from following days sequence’s MONDAY to FRIDAY, MONDAY to
SUNDAY, or individual days by pressing the UP / DOWN buttons. Once you
have set your required days press the ENTER button to save.
7) T1 ON time will now need to be set.
8) Press the UP / DOWN buttons to set the desired hour then press ENTER
9) Press the UP / DOWN buttons to set the desired minutes then press ENTER
10) T1 OFF time will now need to be set.
11) Press the UP / DOWN buttons to set the desired hour then press ENTER
12) Press the UP / DOWN buttons to set the desired minutes then press ENTER
13) Should you wish to clear/cancel the timer function press the UP / DOWN
buttons until T1 CLR is displayed. This means you have cleared/cancelled the
timer.
The time clock has a total of 4 timers, this allows for 4 different ON – OFF times over
a 7-day period.
For example. If you wish to turn your Air Conditioner on at 8am and off at 10pm
Monday to Friday, this can be achieved using the first timer T1
Should you wish to turn the Air Conditioner on at 9am and off at 11pm on Saturday only as
well as the previous time periods this is achieved using the second timer T2 in conjunction with the
first timer T1
Additional timers are set in the same manner as above. If you need more information please contact the
place of purchase.
ACCS-1_UM v1 Copyright © 2005 MJB Controls Pty Ltd All Rights Reserved
Proudly Designed and Manufactured in Australia Page 5 of 6
Trouble Shooting:
Condition Possible Causes
Wall Controller, Condenser Controller,
Evaporator Controller not working
Condenser Controller, Evaporator
Controller green status LED flashing,
but Wall Controller not working.
System runs but intermittently
stops/trips out.
Fault is showing on the LCD Check Fault log and rectify, then clear
EE showing on LCD screen (in place of
Temperature reading)
CONDENSER COMMS FAULT
scrolling on LCD
EVAP COMMS FAULT scrolling on
LCD
Air Conditioner randomly stops / starts but does
not show Fault on the display.
No power to unit, check fuse/CB.
Incorrect wiring between Wall
Controller and Condenser/Evaporator
Controller
Check Fault log and rectify, then clear
log
Log
Wall Controller Temperature probe
Fault. Replace Wall Controller.
Incorrect wiring or faulty Condenser
Controller
Incorrect wiring or faulty Evaporator
Controller
7-day time clock is incorrectly or partly set.
ACCS-1_UM v1 Copyright © 2005 MJB Controls Pty Ltd All Rights Reserved
Proudly Designed and Manufactured in Australia Page 6 of 6
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