5.1
Boiler & Programmer Communication
5.0 Wireless Room Unit
7
1. The units are pre-synced so should communicate with
each other when powered up.
NOTE: Communication between the boiler and the
Programmer & Room Sensor can take up to 2 minutes
to establish. During this time, the boiler may attempt to
fire prior to communication being established.
2. If Error codes 83 or 85 are seen during commissioning,
there is a communication problem.
3. Error 83 is due to the Receiver not communicating with
the boiler. Check the wiring between the Receiver and
boiler. Fig. 9
4. Error 85 is due to the Programmer & Room Sensor not
communicating with the Receiver. The Programmer &
Room Sensor is either out of range or has not
synchronized correctly. Check the unit’s location (Fig 13)
or proceed to the Manual Sync process in Section 6.0
AUTO
1
7
6
5
4
3
2
MODE
MENU
24
21
18
15
12
3
6
9
°C
Fig. 14 Remote unit Error Codes
Fig. 15 Signal Strength Test
Fig. 13 Maximum permitted separation
Boiler
Unit
Receiver
Error
85
Error
83
5. If Error 85 is seen after commissioning, check:
a) The Programmer and Room Sensor and the Receiver are
within range of each other. See Fig. 13 and Section 5.2
b) The units are synchronized correctly. Section 6.1.
c) The wiring is correct between the Receiver and boiler.
Fig. 9
6. The maximum distance between the Receiver and the
Programmer & Room Sensor will depend on the layout of
the house. For a typical house, a guideline of 3 floors or
walls can be used, as shown in Fig 13.
MODE
MENU
24
21
18
15
12
3
6
9
°C
MODE
MENU
24
21
18
15
12
3
6
9
°C
MODE
MENU
24
21
18
15
12
3
6
9
°C
A
B
C
X
Before mounting the Programmer & Room Sensor to the
wall, perform the following test to determine the signal
strength. Fig 15.
1. Press and hold the Selector Button for approximately 6
seconds and HC 1 will be seen in the display.
2. Rotate the Selector Button until ‘tSt OFF’ is seen in the
display.
3. Press the Selector Button and OFF will flash. Rotate the
Selector Button until ON is seen.
4. Press the Selector Button to start the signal strength test.
The test may last for up to 8 minutes. During this time,
numbers ranging from 0 to 4 are displayed. ‘0’ indicates no
signal available and ‘4’ shows excellent signal strength Fig 15.
Baxi recommends locating the unit to give a signal strength
of 3 or 4. If the signal is low, move the unit to a more
suitable location and retest.
5. Press the Selector Button at any time to interrupt the
test or press MENU to escape once the test has finished.
6. If the Manual Sync. process needs to be carried out see
Section 6.0.
5.2
Test for Signal Strength
Baxi Heating UK Ltd 2011
c
Hold for 6 seconds
HC
1
tSt
OFF
tSt
OFF
tSt
ON
0 No Signal
1 Weak Signal
2 Poor Signal
3 Good Signal
4 Excellent Signal
Up to 8
minutes
test
result
Retest
OK
Example A:
1 floor + 2 walls.
Example B:
2 1 wall.
Example C:
3 no walls.
