Baxi 720644701, Installation & User'S Instructions

13.0  Error Codes 

1. Some error codes can be reset. If an error code is seen 
in the display use the reset procedure to try and remove 
the fault. Fig. 29.

2. Press the Selector Button once and rotate immediately 
until ‘rSt’ is shown in the display.

3. Press the Selector Button again and the error should 
reset. If the error doesn’t reset, consult the boiler manual 
for further information.

1. Press the Selector Button once and ‘000’ will be 
displayed.

2. Rotate the Selector Button until ‘015’ is seen is the 
display.

3. Press the Selector Button once and ‘Service Due’ will 
clear. Fig 30.

 NOTE: Resetting this function without completing the 
 required service will invalidate your warranty.

1. If necessary, control can be transferred back to the 
boiler. Either remove the unit from its cradle, or remove 
the plug from the Receiver, then turn the power to the 
boiler off and back on.

15

Baxi Heating UK Ltd 2011 

c

2s

2s

L1 Flash 

L1 Flash 

L1 Flash 

Normal

Operation

Wired - No

Communication

between Boiler

& Transmitter

L1 Flash x 2 

L1 Flash x 2 

L1 Flash x 2 

2s

2s

Wireless - No

Communication

between Room 

Unit & Transmitter

L1 Flash x 3 

L1 Flash x 3 

L1 Flash x 3 

2s

2s

Initialization

Phase between 

Transmitter

& Boiler 

L1 Flash 

L1 Flash 

Parameter

Change

L2 Flash 

2s

1s

Receiver

L1

L2

1s

1s

1s

1s

Programmer & Room Sensor Error Codes (See Sec. 5.1)

85 

Error between Programmer & Room Sensor 

 & 

Receiver

83 

Error between Boiler & Receiver 

13.1

 Error 

Codes 

13.2

Resetting the ‘sd’ - Service Due Code

13.3

 Boiler 

Control

Gas Valve Connection Cable

Gas Valve Fault

Central Heating NTC Fault

Flue NTC Fault

Central Heating Return NTC Fault

Pre-circulation Fault

Safety Thermostat Operated

Primary System Water Pressure Too High

Primary System Water Pressure Too Low

Circulation Fault (Primary)

Flame Failure

Flue NTC Operated

Interruption Of Gas Supply or Flame Failure

Elapsed Time - Gas Valve Open Without Gas

Interruption Of Gas Supply (Internal Error)

Flow/Return Sensor Temperature Test

Fan or Fan Wiring Fault

Circulation Fault (Dry Fire)

Hot Water NTC Fault 

False Flame

09

15

20

28

40

109

110

117

118

125

128

130

133

134

135

154

160

270

321

384

Table 5. Error Codes

Calibration Required

55

rSt

Fig 28. Receiver status indicator LEDs

Fig 29. Resetting Error Codes

000

015

Fig 30. Resetting the Service Due Code.