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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.
RF Programmable Thermostat
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
Exhausted batteries
Check that the batteries have been installed in the correct orientation
Replace batteries
Display shows flashing ‘battery’
symbol
Improper battery compartment insertion Remove battery compartment and re-insert
Batteries need replacing
Change batteries as described previously
The heating is not required at this
moment
The heat demand is sent to the relay box as a value between 0-100%.
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 shows ‘flame’ symbol but
heating does not switch on
What is an RF ProgrammableThermostat?
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.
Boiler switched off
Display works but heating does not
switch on (HC60NG LEDs are off or
green one is on)
Switch the boiler 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
RF communication lost due to the
wrong location of the room unit
HC60NG red LED is constantly on or
flashing
Hook the room unit back on the wall bracket or replace the room unit
on the table stand to the position where RF communication was
reliable.
What will the CM61NG ProgrammableThermo-
stat do for me?
RF communication fault
Call installer
Wireless connection to the boiler allows you to mount the
CM61NG in your room without disrupting the decor
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.
Armchair programming lets you set up your CM61NG while
•
resting comfortably in your armchair
CM61NG not set correctly for your
system
Heating switches on or off too slowly
or too quickly
Call installer
Call installer
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
CM61NG not set correctly for your
system
Temperature swings between too hot
and too cold
Attractive slim styling compatible with any room decor
Fault in the CM61NG
•
•
Display show ‘spanner’ symbol
Remove the battery compartment and re-insert it. If the ‘spanner’
symbol does not clear itself in a few minutes call the installer
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?
Warning.
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.
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.
Arlington Business Park
Bracknell, Berkshire RG12 1EB
Tel: 01344 656000
42010475-003 R1
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