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Heating surface temperature
External room temperature
Hot water top temperature
Hot water bottom temperature
User panel room temperature
AUX temperature (sacrificial
anode)
Preheater or earth tube air
intake temperature
Alarm state bit mask
0x80 : Active alarm(s) present
0x03 : Nb. of alarms listed
Alarm 1 – Code
0x80 : (reserved future use)
0x7F : Display code 1..99
Alarm 1 – Date
Bit word packed in DOS date
format. Year 0 = 1980
15 8 7 0
HHHHHMMM MMMSSSSS
Alarm 1 – Time
Bit word packed in DOS time
format. Seconds are in scale 2
(0..29=0..58 seconds)
15 8 7 0
HHHHHMMM MMMSSSSS
Actual on/off state
0 : Off
1 : On
Actual operation mode
0 : Off
1 : Heat
2 : Cool
3 : Auto
4 : Service