Mitsubishi Electric LAHN-1, Technical & Service Manual

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Specifications are subject to change without notice. © 2019 Mitsubishi Electric US, Inc.
4. Damper actuator manual override
IMPORTANT! Never manually override the damper position if the
outdoor unit could switch to heating mode during the override
period. Heating mode requires the damper to be fully open for
full capacity.
It may be desirable to manually override the damper position and lock
it into position until repairs can be completed. If so, select an average
temperature, typical for the outside environment during the override
period, and then use that average temperature to find the desired
damper angle in the chart below.
Ambient Temp Hood Angle Output Voltage Resistance
[ °F ] [ ° ] v Ω
-10 80 8.78 117960
-5 80 8.78 100184
0 70 7.9 85340
5 70 7.9 72906
10 70 7.9 62460
15 70 7.9 53658
20 60 7.04 46220
25 60 7.04 39917
30 60 7.04 34562
35 60 7.04 30000
40 OPEN 2 26104
45 OPEN 2 22767
Follow the instructions below for manually positioning and locking the
damper in place.
IMPORTANT! Disconnect power to the damper motor before
locking in place.
The damper actuator comes with a crank handle attached, to manually
move the damper position. The crank handle is removable and if it’s
missing, a 3/16” allen wrench will work just as well.
Use the following diagrams and instructions for this procedure.
Damper Actuator Manual Override
IMPORTANT! Never manually override the damper
position if the outdoor unit could switch to heating
mode during the override period. Heating mode
requires the damper to be fully open for full
capacity.
It may be desirable to manually override the damper
position and lock it into position until repairs can be
completed. If so, select an average temperature typical
for the outside environment during the override period,
and then use that average temperature to find the
desired damper angle in the chart below.
Outdoor Thermistor Control board Damper
Temperature Ohms DC volts output Angle
Above 52
o
F
N/A 2.00
0
o
full open
52 18,873 2.00
0
o
50
19,903 3.25
15
o
45
22,767 4.50
30
o
40
26,104 5.80
45
o
35
30,000 7.04
60
o
30
34,562 7.90
70
o
25
39,917 8.75
80
o
20
46,220 9.16
85
o
Below 20
o
F
N/A 9.16
85
o
Follow the instructions below for manually positioning
and locking the damper in place.
IMPORTANT! Disconnect power to the damper
motor before locking in place.
The damper actuator comes with a crank handle
attached, to manually move the damper position. The
crank handle is removable and if it’s missing, a 3/16”
allen wrench will work just as well.
Use the following diagrams and instructions for this
procedure.
Angle Indicator
December 2013
© 2013 Mitsubishi Electric US, Inc.
5
Winding the damper
actuator
Locking the damper
actuator
Unlocking the
damper actuator
(2 options)
- Insert crank handle
- Turn the handle in
the direction of the
arrow.
- Flip the lock switch
to the position
pointing to the
“locked” symbol.
- Flip the lock switch
to the position
pointing to the
“unlocked” symbol.
- Remote control by
supplying power to
the unit for > than 3
sec.
Damper Actuator Manual Override
IMPORTANT! Never manually override the damper
position if the outdoor unit could switch to heating
mode during the override period. Heating mode
requires the damper to be fully open for full
capacity.
It may be desirable to manually override the damper
position and lock it into position until repairs can be
completed. If so, select an average temperature typical
for the outside environment during the override period,
and then use that average temperature to find the
desired damper angle in the chart below.
Outdoor Thermistor Control board Damper
Temperature Ohms DC volts output Angle
Above 52
o
F
N/A 2.00
0
o
full open
52
18,873 2.00
0
o
50
19,903 3.25
15
o
45
22,767 4.50
30
o
40
26,104 5.80
45
o
35
30,000 7.04
60
o
30 34,562 7.90
70
o
25 39,917 8.75
80
o
20 46,220 9.16
85
o
Below 20
o
F
N/A 9.16
85
o
Follow the instructions below for manually positioning
and locking the damper in place.
IMPORTANT! Disconnect power to the damper
motor before locking in place.
The damper actuator comes with a crank handle
attached, to manually move the damper position. The
crank handle is removable and if it’s missing, a 3/16”
allen wrench will work just as well.
Use the following diagrams and instructions for this
procedure.
Angle Indicator
December 2013
© 2013 Mitsubishi Electric US, Inc.
5