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Honeywell CM700 Manual

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Installation Guide 11
6) Trouble Shooting
6.1 Trouble Shooting Guide
Symptom (Fault
Message)
Possible Cause Remedy
The room thermostat
displays the
symbol but
the relay box relay does not
switch on.
This is normal operation. The relay box cycles
the relay on and off for times proportional to
the demand signal (0-100%) from the room
thermostat. The
symbol only indicates that the
demand value is greater than 0%.
Using the
button change the
temperature setpoint by a few degrees.
The relay box should switch the relay on
after a few seconds delay.
The relay box does not
react to setpoint changes
on the room thermostat.
The room thermostat and relay box are not
bound.
Reset the relay box by pressing and
holding the push button for 15 seconds.
Then follow the binding / rebinding
procedure as described in section 5)
Additional Installation Information.
After the binding procedure
the red LED is on and the
green one is flashing once
every 3 sec on the relay
box.
Incorrect or incomplete binding procedure.
Incorrect position of the room thermostat during
binding.
Repeat the binding procedure.
Repeat the binding procedure keeping
approx. 1 m distance between the relay
box and the room thermostat.
The red LED on the
relay box is illuminated
(Communication loss)
The relay box receives no RF messages from the
room thermostat:
RF signal is blocked due to wrong location of the
room thermostat.
Room thermostat batteries are exhausted.
Re-locate the room thermostat following
instructions in section 2) Installing the
CM700 Wireless System.
Replace batteries in the room thermostat.
6.2 Diagnostic Mode
The CM727/721 room thermostat has a user accessible mode that provides information useful to a remote
service person and a means of checking whether the boiler is working. To access this press the OFF
button, then press and hold the button for 5 seconds. The room thermostat will enter the user settings
mode. Next press and hold the and buttons together. The room thermostat will hold the relay on for
5 minutes and the following information can be viewed on the display by pressing the or button. :
model ID, date code (WW/YY) & checksum.
… 11


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  • I wish to set the operation to day by day and hour by 4 hour intervals. Is this possible Submitted on 2-4-2022 at 12:11

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