Honeywell manual CM61NG Trouble-Shooting Guide, What is Optimum Start?

What if something happens to my heating system? How can I check that the CM61NG is working?

See the troubleshooting guide below. If you need assistance after this call your installer.

CM61NG Trouble-Shooting Guide

Symptom	Possible Cause	Remedy
Blank display	No batteries	Check that the batteries are in the battery compartment and that the
		paper tab has been pulled out
	Wrong battery orientation	Check that the batteries have been installed in the correct orientation
	Exhausted batteries	Replace batteries
Display shows flashing ‘battery’	Improper battery compartment insertion	Remove battery compartment and re-insert
symbol
	Batteries need replacing	Change batteries as described previously
Display shows ‘flame’ symbol but	The heating is not required at this	The heat demand is sent to the relay box as a value between 0-100%.
heating does not switch on	moment	The relay box will adjust the boiler on time to meet this requirement.
		That is why the heating will be off sometimes even if the ‘flame’
		symbol is displayed. To check if RF system is communicating properly
		press the TEMPerature UP button to increase the set temperature a
		few degrees above the current temperature. The heating should come
		on after a few seconds
Display works but heating does not	Boiler switched off	Switch the boiler on
switch on (HC60NG LEDs are off or
green one is on)	Wrong electrical connection	Call electrical installer to check the boiler and relay box power supply
		as well as the connection between the boiler and the relay box
HC60NG red LED is constantly on or	RF communication lost due to the	Hook the room unit back on the wall bracket or replace the room unit
flashing	wrong location of the room unit	on the table stand to the position where RF communication was
		reliable.
	RF communication fault	Call installer
		NOTE: You can control the boiler manually when the RF communica-
		tion is lost:
		Press the HC60NG push button to switch the boiler on and off. When
		the green LED is on – the boiler is on.
Heating switches on or off too slowly	CM61NG not set correctly for your	Call installer
or too quickly	system
Temperature swings between too hot	CM61NG not set correctly for your	Call installer
and too cold	system
Display show ‘spanner’ symbol	Fault in the CM61NG	Remove the battery compartment and re-insert it. If the ‘spanner’
		symbol does not clear itself in a few minutes call the installer

Warning.

This product and its associated documentation and packaging are protected by various intellectual property rights belonging to Honeywell Inc and its subsidiaries and existing under the laws of the UK and other countries. These intellectual and property rights may include patent applications, registered designs, unregistered designs, registered trade marks, unregistered trade marks and copyrights and also include the following UK registra- tion rights:

UK patent application number 98062207.8

UK registered design numbers 2073334, 2073340 and 2073343.

	honeywell
Honeywell Control Systems Ltd.	www.honeywell.com/uk/homes.htm
Arlington Business Park
Bracknell, Berkshire RG12 1EB
Tel: 01344 656000

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RF Programmable Thermostat

What is an RF Programmable Thermostat?

A Honeywell Radio Frequency (RF) programmable thermostat is a thermostat that controls your heating system so that you can have comfortable temperatures when you are at home and energy savings when you are out. With RF communication there is no need to provide a wired connection between thermostat and boiler. The CM61NG can therefore be installed without disrupting your room decor. These instructions explain how to program and operate your CM61NG to get the most comfort at the least cost.

What will the CM61NG Programmable Thermo- stat do for me?

•Wireless connection to the boiler allows you to mount the

CM61NG in your room without disrupting the decor

•Armchair programming lets you set up your CM61NG while resting comfortably in your armchair

•Optimum Start means that the CM61NG will switch on your heating system so that your desired comfort temperature is

reached at the programmed time, thus avoiding unnecessary boiler firing

•Attractive slim styling compatible with any room decor

•6 daily independent temperature levels let you set any 6 temperatures from 5 to 30°C to match your daily lifestyle

•Holiday button saves energy by letting you reduce the tempera- ture for 1 to 99 days while you are on holiday, returning to normal

operation on the day you return

•Memory holds the user program indefinitely so that it is never lost even if you take the batteries out

What is Optimum Start?

Instead of switching on the heating at the set time every day, the CM61NG will delay the start time to the latest possible moment, so

that unnecessary heating is avoided. All you have to do is set the time when you want comfort temperature and the CM61NG will then decide when to turn the heating on, thereby ensuring your comfort.

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