Fujitsu ASU18RLB Service Instructions Manual page 53

Trouble shooting 27
Too Warm
Check Point 1 : Check insulation level of structure
of house
Is insulation level greater than R-13.
NO
Check Point 2 : Verfity room temperature sensing location
Do you want room temperature sensed at the
wired remote controller (Wired remote sensor) or
by they build in sensor inside the unit (Indoor unit sensor).
"Indoor unit sensor"
Check Point 3 : Check the remote controller display
Is the "Thermo Sensor Icon" displayed on the screen?
NO
Check Point 4 : Check Function Settings
Using the table on the right adjust function 31.
(Room Temperature Control for indoor unit sensor)
※ Please reference the APPENDING DATA
Forecast of Cause
1. House insulation setting has not been changed.
2. Temperature sensing location has not been changed.
3. Installation location of the wired remote.
4. Function settings have not been changed.
YES
Too warm
02-29
:
Check Point 1-1 : Check Function Setting
If insulation level is greater than R-13 set function 95 to 01.
Ref.)
Setting Value
Function Number
00
95
01
※
Please reference the APPENDING DATA
Check Point 1-2 : Check effects of Function Setting change
Is the space still too warm in relation to set point.
"Wired remote sensor"
Check Point 3-1 : Check the remote controller
Hold down the THERMO SENSOR button until
the thermo sensor icon is turned off.
YES
Ref.)
Function Number Setting Value
31
(For
heating)
Setting Description
Standard insulation
High insulation
OK
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Too warm
Setting Description
00 Standard setting
No correction 0.0°F (0.0°C)
01
02 -1°F (-0.5°C)
-2°F (-1.0°C)
03
04 -3°F (-1.5°C)
Less
05 -4°F (-2.0°C)
Heating
06 -5°F (-2.5°C)
-6°F (-3.0°C)
07
-7°F (-3.5°C)
08
09 -8°F (-4.0°C)