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Holding Register (Analogue Output)
Register Name
Addr
Fault/Error Code (hex)
9
[READ ONLY]
MelcoBEMS MINI (A1M)
Firmware Version
10
[READ ONLY]
Modbus Comms Counter
11
[READ ONLY]
Fault Code (decimal)
12
[READ ONLY]
System Type Detected
13
[READ ONLY]
System On/Off
25
Operating Mode
26
Operating Mode (DHW)
27
Modicon
Details
Address
0x8000 = No error
0x6999 = Bad communication with unit
40010
(Refer to indoor unit documentation for description
of other fault code values)
40011
MelcoBEMS MINI (A1M) Firmware Version
Value of a counter which increments upon every
40012
valid Modbus command received. Counter is reset
to zero when value exceeds 65535.
8000 = No error
6999 = Bad communication between A1M and unit
40013
(Refer to unit documentation for description of other
fault code values)
0 = ATA unit connected
1 = ATW system connected
40014
2 = Lossnay system connected
255 = Undetermined (no unit detected yet)
0 = System OFF
1 = System ON
40026
2 = Emergency Run (read only value)
3 = Test Run (read only value)
0 = Stop
1 = Hot Water
2 = Heating
3 = Cooling
4 = No voltage contact input (hot water storage)
5 = Freeze Stat
40027
6 = Legionella
7 = Heating-Eco
8 = Mode 1
9 = Mode 2
10 = Mode 3
11 = No voltage contact input (heating up)
0 = Normal
40028
1 = Eco
Applicable Unit Type
( )
( )
( )
#14
#18
#14
#18
#14
#18
( )
( )
( )
#4
#5
#18
#18
#13
#18
32
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