Item Function Description
Indoor unit
monitoring
On/Off Status*
The indoor unit which is now operating can be
monitored in all indoor units
Operation mode setting status Cooling/Heating/Auto/Fan/Dry mode status
Temperature setting status Room set temperature status
Airflow mode setting status Airflow mode status
Set point temperature limit status Room set temperature limit status
Thermostat off setting status* Thermostat off set value status
Centrally control (Filter reset) status Remote controller filter reset prohibition status
Centrally control (All mode) status Remote controller all mode prohibition status
Centrally control (Timer mode) status Remote controller timer mode prohibition status
Centrally control (Set temperature)
status
Remote controller set temp. prohibition status
Centrally control (On/Off) status Remote controller On/Off prohibition status
Centrally control (On) status Remote controller On prohibition status
Centrally control (Operation) status Remote controller operation prohibition status
Anti-freeze setting status Anti-freeze setting status
Energy save mode setting status Energy save mode set status
Filter sign reset status Filter sign reset status
Room temperature status Room temperature status
Error code status Error code status can be monitored.
Vertical/Horizontal airflow direction
louver status
Vertical/Horizontal airflow direction louver status
Indoor unit status
Defrost/oil recovery/pump down can be
monitored.
Human detection auto save Set human detection auto save status
Human detection auto off Set human detection auto off status
Demand status Demand control status
Convertor unit
monitoring
Error code Status Error code status
Modbus communication setting
information
Baud rate/slave address can be monitored.
Model name Convertor model name can be confirmed.
Software version Convertor software version can be confirmed.
NOTES:
• For detailed information, refer to the interface specification posted on “Service & Supports” page
of the web site.
https://www.fujitsu-general.com/global/support/
• *: To protect the compressor of the outdoor unit, carefully read and understand the following
caution that may affect the operation of compressor before executing the setting.
CAUTION
When performing periodical settings like schedule settings for the following functions, perform
the setting to all indoor units in the same refrigerant system simultaneously, conforming to the
timing restriction described below.
<Corresponding function>
More than 10 minutes
must elapse
More than 10 minutes
must elapse
• Stop operation
• Set indoor unit forced thermostat off mode
• Start operation
• Release indoor unit forced thermostat off mode
3-8. Modbus converter for indoor unit (UTY-VMSX)
- (05-164) - 3. Adaptor/Convertor units
CONTROL
SYSTEM
CONTROL
SYSTEM
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