Fujitsu ASU18RLF Service Instructions Manual page 87

Trouble shooting 42
Too Cool
Test 1 : Check insulation level of structure of house
Is insulation level greater than R-13.
NO
Test 2 : Verity 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"
Test 3 : Check the remote controller display
Is the "Thermo Sensor Icon" displayed
on the screen?
NO
Test 4 : Check Function Settings
Using the table on the right adjust function 30.
(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.
Test 1-1 : Check Function Setting
YES
Ref.)
Too cool
Test 1-2 : Check effects of Function Setting change
Is the space still too warm in relation to set point.
Test 3-1 : Check the remote controller
Hold down the THERMO SENSOR button until the
thermo sensor icon is turned off.
YES
Ref.)
02-47
If insulation level is greater than R-13
set function 95 to 01.
Setting Value
Function Number Setting Description
00
Standard insulation
95
01 High insulation
※
Please reference the APPENDING DATA
"Wired remote sensor"
Too cool
Function Number Setting Value
00
No correction 0.0°F (0.0°C)
01
10
11
30 12
(For cooling)
13
14
15
16
17
OK
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Setting Description
Standard setting
+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)