© 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
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
7700
Relay test
No test
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
Status
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
---
8005
Status boiler
---
8007
Status solar
---
8008
State solid fuel boiler
---
8010
Status buffer
---
8011
Status pool
---
Diagnostic Cascade