Johnson Controls YVAHP0721CW Series, Service Manual

Page: 379 / 416

SM-16007
5-19
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
5.3.2.2 Description of Function Setting Item
(1) Circulator Function at Heating Thermo-OFF (Function Setting “FA”)
Press “PSW3” and select the setting conditions “0 to 4” in Circulator Function at Heating Thermo-OFF “ ”.
Normally, the fan speed is changed to “LOW” at heating Thermo-OFF. (It is possible for the room
temperature to be too high at the heating Thermo-OFF.) However, the indoor fan motor is operated at “LOW”
and stopped repeatedly by setting this function.
NOTE:
When the compressor is stopped, the indoor fan motor operates at “LOW” speed continuously.
The action when the indoor fan motor operates at the circulator function is indicated as follows.
Contents of Function Setting Item "FA"
“FA” Setting Condition
0 1 2 3 4
Indoor Fan Motor
“LOW” Operation Time
X (min.)
(Continuous
Operation)
2 2 2 0
Indoor Fan Motor
Stop Time
Y (min.)
0 6 13 28 Stopped
NOTE:
If using function setting No. 2 to 4, install the remote sensor (THM-R2A: Optional).
Because the time period of stopping the indoor fan becomes longer, the detected value of the inlet
air thermistor for the indoor unit becomes high, and it may take time to Thermo-ON.
Fan Motor Operation
X (min.)
Fan Motor Stop
Y (min.) X (min.) Y (min.)
*In this section, Thermo-ON/Thermo-OFF mean for the indoor unit.
Thermo-ON: The indoor unit is running.
Thermo-OFF: The indoor unit stays on, but doesn’t run.