Fujitsu AUXB12GA* H - COOL Position for Outdoor Air Unit; HEAT Position for Outdoor Air Unit

03-09
3-2-7 "COOL" Position for Outdoor air unit
An example for COOLING TEMPERATURE CONTROL time chart (Manual setting)
When using the cooling mode, set the temperature to a value lower than the discharge airflow temperature, otherwise
the outdoor air unit will not start the cooling operation and only the fan will rotate.
100%
0%
•
ON
•
Outdoor temp.
Ts : Corrected setting temperature
Ts - 5°C
Ts + 0.5°C : The thres hold temperature of start of refrigerant flow
Ts - 5°C : The thres hold temperature of stop of refrigerant flow
3-2-8 "HEAT" Position for Outdoor air unit
(1) When using the heating mode, set the temperature to a value higher than the discharge airflow temperature, otherwise
the outdoor air unit will not start the heating operation.
An example for HEATING TEMPERATURE CONTROL time chart (Manual setting)
During defrosting, the OPERATION indicator lamp flashes 6 sec. ON and 2 sec. OFF, and repeat. The heating operation
will be temporarily interrupted.
Excess capacity area
Compressor ON
(6 minutes)
•
100%
0%
•
ON
•
Outdoor temp.
Ts : Corrected setting temperature
Ts +5°C
Ts - 0.5°C : The thres hold temperature of start of refrigerant flow
Ts + 5°C for 5 minutes or more
: The thres hold temperature of stop of refrigerant flow
Excess capacity area Excess capacity area
Discharge airflow
Temperature
OFF
ON
OFF
Refrigerant
flow
Opening of
EEV
•
Ts
Outdoor air unit
fan
Compressor OFF
(3 minutes)
Compressor ON
(6 minutes)
5 minutes has passed
at excess capacity area
5 minutes has passed
at excess capacity area
Compressor ON
(6 minutes)
Compressor OFF
(3 minutes)
Compressor ON
(6 minutes)
(2)
Discharge airflow
Temperature
OFF
ON
OFF
Refrigerant
flow
Opening of
EEV
•
Ts
Outdoor air unit
fan
•