Honeywell Y9120W Sundial RF2 Pack 4 User Manual Download

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FAQ AND TROUBLESHOOTING

Troubleshooting Guide

This is a quick guide to help you diagnose and cope with possible problems with

your wireless control system. For further assistance, please contact your Installer.

Symptom

Possible Cause

Remedy

ST9120C has a blank

LCD display

No power to the

heating system

Check that there is power to the

heating system

Fault in ST9120C

Call Installer

ST9120C indicates the

system is

, but taps

are running with cold

water.

Temperature controls

are switched off or

set too low

Check that the temperature controls in

the system are set to appropriate levels

Boiler or other

system controls

have malfunctioned

Call Installer

ST9120C shows the

message:

‘INTERNAL FAULT’

Fault in ST9120C

Call Installer

Every few seconds, the

ST9120C screen shows

the message:

ST9120C is counting

down the number of

days until your next

boiler service is due.

Arrange a boiler service before the

counter reaches zero.
After servicing your boiler, the Service

Engineer / Installer will reset the

ST9120C to remind you when the next

boiler service is due. Each service is

normally a maximum of 1 year apart.

Although the heating

is still operating, the

ST9120C screen keeps

flashing the message:

Your boiler service is

overdue

Arrange an immediate boiler service.
After servicing your boiler, the Service

Engineer / Installer will reset the

ST9120C to remind you when the next

boiler service is due. Each service is

normally a maximum of 1 year apart.

The ST9120C screen

shows the message:

Your boiler service

overdue

and

the boiler has

been automatically

switched off to

ensure your safety.

Arrange an immediate boiler service.
If set to do so, it may be possible to

obtain limited use of the boiler by

pressing the

EXTRA HOUR

button.

Each button press will allow operation

of the boiler for 1 hour at a time, and

the screen will display the message

‘On 1h’

After servicing your boiler, the Service

Engineer / Installer will reset the

ST9120C to remind you when the next

boiler service is due. Each service is

normally a maximum of 1 year apart.

Summary of Contents for Y9120W Sundial RF2 Pack 4

Page 1: ...me models switch the central heating and domestic hot water on and off at the same time while others allow the domestic hot water and heating to come on and go off at different times Set the On and Off time periods to suit your own lifestyle On some programmers you must also set whether you want the heating and hot water to run continuously run under the chosen On and Off heating periods or be per...

Page 2: ...ribed within this document For use outside of the scope as described herein refer to Honeywell for guidance Honeywell cannot be held responsible for misapplication of the product s described within this document Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl ACS ECC EMEA Z A La Pièce 16 1180 Rolle Switzerland by its Authorised Re...

Page 3: ...G YOUR ST9120C Choosing the Operating Mode 12 Overriding the Operation Without Changing the Programmes 12 The Extra Hour Function 13 The Holiday Function 13 Enquiry Mode 14 FINE TUNING YOUR ST9120C Changing from AM PM Time Display to the 24 Hour Clock 15 Changing the Installer Parameters 15 BOILER SERVICE REMINDER Countdown to Service When Service is Due 18 Shut down 19 OPERATING YOUR CS92A HOT WA...

Page 4: ...following instructions explain how to programme and use the ST9120C and associated controls to provide the most home comfort at the least cost The way to use a Timer Think about the time periods when you are typically in the house and when you are not These are the times you should use as the basis for the programmes It will be necessary to allow some heat up time for the heating system after peri...

Page 5: ...lect how you want to operate your hot water A typical use of this feature would be if you take a mid week day off work you can then set the MODE to ONCE to keep the system ON during the day from the first programmed ON time till the last programmed OFF time Your Cylinder Thermostat Your CS92A wireless cylinder thermostat measures the water temperature and signals this to the ST9120C timer The time...

Page 6: ...ive you feedback about what is required Step 1 Setting the Date Time Your ST9120C had the date and time set at the factory and these are normally maintained by a backup battery in the event of power failures If you wish to change the date or time or if the LoT Display shows the message SET DATE TIME just follow the instructions below Otherwise go to Step 2 a Move the slider to the DAY TIME positio...

Page 7: ...ou can move to the next step If the date you set was not valid for example 31 September the message INVALID will show and you will be returned to the start of the date setting operation e The time will now be flashing and the message SET THE TIME will be displayed To change the time press the or buttons until the correct time is shown Each press of the button will change the time by one minute Hol...

Page 8: ...nday to Friday 6 30am 8 30am 12 00pm 1 00pm 4 30pm 10 30pm Saturday Sunday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3 Monday Tuesday Wednesday Thursday Friday Saturday Sunday Your Personal Programme The table below has been left blank for you to record your own personal programme Built in Programme Profile b ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3 Monday to Friday 6 30am...

Page 9: ...o allow you to programme to stay on past midnight if required a Move the slider to the PROGRAMME position SET PROGRAMME will show briefly to verify this action b SET ON TIME 1 will then be displayed and the time setting for the first ON 1 time for MONDAY will now be flashing to indicate it can be changed If you do not wish to change the time press the green button and move to the next step If you ...

Page 10: ...ext ON OFF time without making any changes e After setting or reviewing the last off time OFF 3 the message COMPLETE will be displayed to indicate the times for Monday have been set You now have a choice of how to set the programme for the next day Copying One Day s Programme to Another Day example Monday to Tuesday f Whilst the day is showing Monday Press the COPY DAY button The message COPY MON ...

Page 11: ...for more than 10 minutes without the slider being moved or any buttons pressed the message MOVE SLIDER will be displayed Press a button to finish programming or move the slider to the RUN position Disabling Enabling Time Periods To disable any of the time periods ON 1 to OFF 1 ON 2 to OFF 2 or ON 3 to OFF 3 simply set the ON time and its paired OFF time to the same time and the programme will just...

Page 12: ...ystem will remain OFF AUTO Automatic mode The system will be switched ON and OFF according to the programme ONCE mode The system will come ON at the first programmed ON time and go OFF at the last programmed OFF time CONT Continuous mode The system will remain ON continuously Overriding the Operation Without Changing the Programmes In AUTO and ONCE operating modes the OVERRIDE button switches the ...

Page 13: ...ome but resumes normal operation on the day of your return To set the Holiday function a Ensure the slider is in the RUN position then press the HOLIDAY button once The message SET HOLIDAY will appear briefly followed by SET DAYS AWAY b Use the or buttons to set the number of days you will be away The display will show the number of days and this number will be flashing to indicate it can be chang...

Page 14: ...nformation is being viewed and the main display will show the value If the information is not available the display will show dashes instead of a temperature value The table below shows the type and sequence of information available in Enquiry Mode To exit Enquiry Mode If the button is not pressed for 30 seconds your ST9120C will return to RUN mode Information LoT Message Other display symbols Roo...

Page 15: ...tions that are possible Your installer should set this up for you to suit your application see CONFIGURATION SERVICE DATA section However you may wish to alter some of the settings yourself and this section shows you how to do this Note some parameters indicated by are not used used if your system is only controlling the hot water INSTALLER PARAMETER Parameter Number Default Value Options Descript...

Page 16: ...by pressing the or buttons At this point the description in the LoT Display will change and the parameter value will flash If you press the value will stop flashing and be saved for use INSTALLER PARAMETER Parameter Number Default Value Options Description Optimum start 9 0 0 1 2 0 no optimum start 1 delayed start 2 optimum start on Optimum start limit 10 1 1 2 3 1 1 hour 2 2 hours 3 3 hours Optim...

Page 17: ... or buttons to change the parameter value g Any parameter changes that have been confirmed with the button will be saved and used To Exit Installer Mode h You can exit Installer Mode at any time by moving the slider to the next position and then back again to RUN Note Installer Mode will exit automatically after 10 minutes if the slider is not moved ...

Page 18: ...m to ensure your safety If this happens you must arrange an immediate service visit Contact details should be listed on page 26 of this guide in the section Boiler System Service Log A contact telephone number may also have been programmed into the ST9120C If so a message will appear on the LoT Display indicating the number you should call Countdown to Service Your ST9120C can indicate a countdown...

Page 19: ...ER SERVICE REMINDER OPERATING YOUR CS92A HOT WATER THERMOSTAT Basic Operation Your CS92A consists of a sensor element that is strapped to the metal surface of the hot water cylinder and a wireless transceiver box that is normally mounted on a wall surface apart from the cylinder The transceiver communicates with the ST9120C programmer and regularly sends the hot water temperature measurement to it...

Page 20: ...rovide feedback as shown in the table Go to the FAQ AND TROUBLSHOOTING section for more information Green Light Red Light Status On Flashes up to 5 times in succession then repeats Everything is OK red light shows signal strength press button again to exit Off Flashes 0 1 s on 0 9 s off Battery low condition replace batteries Off Flashes 0 5 s on 0 5 s off Sensor error check sensor connection Off ...

Page 21: ...a page 26 to see how your Installer has configured your product What should I do if I get lost while programming the ST9120C The LoT Display on ST9120C will provide you with help and tips to work through the programming Should you ever get lost the simplest thing to do is to move the slider to the RUN position and then move it back to the appropriate programming position where you got lost At this...

Page 22: ...icated on CS92A as described on page 19 Simply replace the batteries as shown on page 19 and wait a few minutes for communications to become re established If this does not resolve the problem it may be that the RF signal path between the ST9120C and the CS92A is blocked by a metal object Check the direct path between the two devices and reposition any object that may be blocking the signal or mov...

Page 23: ...ches zero After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart Although the heating is still operating the ST9120C screen keeps flashing the message Your boiler service is overdue Arrange an immediate boiler service After servicing your boiler the Service Engineer Insta...

Page 24: ... CS92A batteries see page 19 for how to do this RF communication path between ST9120C and CS92A is blocked possibly by a metal object Check direct path between both products and re position any objects that may be blocking the signal Relocate the CS92A transceiver if possible ST9120C shows the message SENSOR FAULT and a flashing tap symbol CS92A sensor error indication Press CS92A button and red l...

Page 25: ...25 ...

Page 26: ...utomatic time change disabled enabled 1 day or 5 2 day or 7 day operation 1 day operation 5 2 day operation 7 day operation Number of ON OFFs per day 2 on offs per day 3 on offs per day Default time programme A standard b at home C economy Hot water set temperature From 40 to 85 C 60 C Optimum start no optimum start delayed start optimum start on Optimum start limit 1 hour 2 hours 3 hours Optimum ...

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