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TVP Manual (full) March 2007 CE rev 03.doc
Operational commands
>Read Commands ‘r’
Read commands are used to interrogate the systems and are very helpful when diagnosing
faults.
>Write Commands ‘w’ are used to change status of the system from cool to defrost for
example.
>------------------------------
>w2o – write 232 control ON
>w2f – write 232 control OFF
>wso – write System ON – switch unit on (standby)
>wsf – write System OFF – switch unit off
>wss – write Standby 1 – Standby main or coil 1
>w2s – write Standby 2 – Standby coil 2 dual coil units only
>wsc – write Cool 1 – Cool or coil 1 dual coil units
>ws2c – write Cool 2 – cool coil 2 dual coil units only
>wsd – write Defrost 1 – defrost coil 1 or defrost
>w2d – write Defrost 2 – defrost coil 2 (dual coil units only)
>------------------------------
Please refer to the installation section of the manual for advanced instructions and detailed set
up guide.
To operate the TVP under RS232 the following typical control command sequence would be
followed:
I.
W2o – Turns RS232 control ‘on’
II.
Wso – Turns TVP on
III.
Wsc – System ‘cool’
IV.
Wsd – System ‘defrost’
(commands III and IV may be repeated indefinitely at each cycle)
Wss – Places systems in standby
Wsf – switches the TVP off