T-M50 / T-M50 ASME Service Manual
Ver. 1.05
69
CONFIDENTIAL
12-15. High-Altitude Region Support Functions (FM+, FM++, FM+++ and INPUT-)
＜
Using this function
＞
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 left bank
of dipswitches (No.1 and No.8) on the computer board.
*T-M50 installation manual doesn’t mention this function for safety purposes.
Level
Elevation
Function
Setting Method
0
0 to 2,500 ft
(DEFAULT)
Standard setting
(Default)
Left bank of dipswitches No.1 OFF
No.8 OFF
1
2,500 to 4,000ft
FM+ function
・
the fan motor speed increased by 6%
Left bank of dipswitches No.1 ON
No.8 OFF
2
4,000 to 5,000ft
FM++ function
・
the fan motor speed increased by
12%
Left bank of dipswitches No.1 OFF
No.8 ON
3
Over 5,000ft
FM+++ function*
・
the fan motor speed increased by
18%
Left bank of dipswitches No.1 ON
No.8 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.
Left/right computer boards
Bank of dipswitches
