© MHG Heating Ltd
83
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email info@mhgheating.co.uk
Web www.mhgheating.co.uk
010711
simulation
7170
Telephone customer
service
IO test
Used to check inputs and
outputs
Line no. Data point Value Unit
7730
Outside temperature
B9
------- °C
7732 Flow temperature B1 ------- °C
7750 DHW temperature B3 ------- °C
7760
Boiler temperature
B2
------- °C
7820
Sensor temperature
BX1
23.1 °C
7821
Sensor temperature
BX2
------- °C
7830
Sensor temperature
BX21 module 1
------- °C
7831
Sensor temperature
BX22 module 1
------- °C
7832
Sensor temperature
BX21 module 2
------- °C
7833
Sensor temperature
BX22 module 2
------- °C
7840 Voltage signal H1 0 V
7841 Contact state H1 Open
7845 Voltage signal H2 0 V
7846 Contact state H2 Open
7870 Signal burner fault S3 0V
7881
Signal 1st burner
stage E1
0V
Line no. Data point Value Unit
8000
Status heating circuit
1
Room frost protection
active
8001
Status heating circuit
2
---
8002
Status heating circuit
P
---
8003 Status DHW ---
8004
Status cooling circuit
1
---
8008 State solid fuel boiler ---