110 Indoor / 110 Outdoor Service Manual
Ver. 1.01
53
CONFIDENTIAL
12-8. High-Altitude Region Support Functions (FM+, FM++ and FM+++)
＜
Using these functions
＞
The high-altitude region support functions have four operation
levels, with the appropriate level being set up by the installer until
the abnormal sound problem is solved. The desired level can be
specified at the bank of dipswitches (No.3 and No.4) on the
computer board. See the table in the next page.
*110 models installation manual doesn’t mention this function for safety purposes.
Level
Elevation
Function
Setting Method
0
0 to 2,000 ft
(DEFAULT)
Standard setting
(Default)
Bank of dipswitches No.3 OFF
Bank of dipswitches
No.4 OFF
1
2,000 to 4,000ft
FM+ function
・
the fan motor speed increased by 6%
(110 Indoor)
・
the fan motor speed increased by 4%
(110 Outdoor)
Bank of dipswitches No.3 ON
Bank of dipswitches No.4 OFF
2
4,000 to 6,000ft
FM++ function
・
the fan motor speed increased by
12% (110 Indoor)
・
the fan motor speed increased by 8%
(110 Outdoor)
Bank of dipswitches No.3 OFF
Bank of dipswitches No.4 ON
3
Over 6,000ft
FM+++ function*
・
the fan motor speed increased by
18% (110 Indoor)
・
the fan motor speed increased by
12% (110 Outdoor)
Bank of dipswitches No.3 ON
Bank of dipswitches No.4 ON
4
Consult our Technical Services Department.
If the abnormal sound problem persists even with a “Level 3” setting, please contact our Technical Service Department.
for advice. Note that there are many high risks associated with manually changing the manifold pressures.
Dipswitches
