LG M4214TG Owner's Manual page 52

RS-232C
Transmission / Receiving Protocol
23. Elapsed time return(Command : d l)
To read the elapsed time.
Transmission
[d][l][][Set ID][][Data][x]
* The data is always FF(in Hex).
Acknowledgement
[l][][Set ID][][OK/NG][Data][x]
* The data means used hours.
(Hexadecimal code)
24. Temperature value (Command : d n)
To read the inside temperature value.
Transmission
[d][n][][Set ID][][Data][x]
* The data is always FF(in Hex).
Acknowledgement
[n][][Set ID][][OK/NG][Data][x]
* The data is 1 byte long in Hexadecimal.
25. Lamp fault Check(Command : d p)
To check lamp fault.
Transmission
[d][p][][Set ID][][Data][x]
* The data is always FF(in Hex).
Acknowledgement
[p][][Set ID][][OK/NG][Data][x]
Data 0 : Lamp Fault
1: Lamp OK
Controlling the Multiple Product
A14