Fujitsu ASU7RLF1 Service Instructions Manual page 74

Trouble shooting 37
Too Cool
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 30.
(Room Temperature Control for indoor unit sensor)
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 cool
02-42
:
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
Check Point 1-2 : Check effects of Function Setting change
Is the space still too cool in relation to set point.
"Wired remote sensor"
Check Point 3-1 : Check the remote controller
Hold down the THERMO SENSOR button until
YES
the thermo sensor icon is turned off.
Ref.)
Function Number Setting Value
00
01
10
11
30
12
(For
13
cooling)
14
15
16
17
Setting Description
Standard insulation
High insulation
OK
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Too cool
Setting Description
Standard setting
No correction 0.0°F (0.0°C)
+1°F (+0.5°C)
+2°F (+1.0°C)
+3°F (+1.5°C)
Less
+4°F (+2.0°C)
Cooling
+5°F (+2.5°C)
+6°F (+3.0°C)
+7°F (+3.5°C)
+8°F (+4.0°C)