Manual Adjustment Function Of Outside Temperature (To) Sensor - Carrier MMY-MAP0724FT9UL Service Manual

8-7-9. Manual Adjustment Function of Outside Temperature (TO) Sensor

This function is provided to fix TO sensor value manually by the switch operation on the interface P.C. board in
the outdoor unit. When the unit stops abnormally due to TO sensor failure, etc, an emergent operation is
available by setting up the value manually to position near the current outside temperature.
[Operation]
(1) Set the rotary switches on the interface P.C. board to numbers as follows:
• SW01/SW02/SW03 to [2/1/15]
• 7-segment display: [ t o ]
(2) Keep pushing the push switch SW04 on the interface P.C. board for 1 second or more. The mode changes
to the TO sensor value fix manual mode.
(3) As shown in the following table, TO sensor value can be fixed by setting the rotary switch SW02 on the
interface P.C. board.
[Clear]
Return SW01/SW02/SW03 on the interface P.C. board in the outdoor unit to [1/1/1].
SW02 7-segment display [B]
1 [ 50 ]
2 [ 59 ]
3 [ 68 ]
4 [ 77 ]
5 [ 86 ]
6 [ 95 ]
7 [ 104 ]
8 [ 109 ]
9 [ 113 ]
10 [ 5 ]
11 [ 14 ]
12 [ 23 ]
13 [ 32 ]
14 [ 35 ]
15 [ 41 ]
16 [ 44 ]
NOTE
If operated with TO sensor fixed by this function, the system control operation of the air conditioner may not be
based on the specification of the product. Therefore an emergent operation should be restricted to a day or so.
TO sensor value
50˚F (10˚C)
59˚F (15˚C)
68˚F (20˚C)
77˚F (25˚C)
86˚F (30˚C)
95˚F (35˚C)
104˚F (40˚C)
109˚F (43˚C)
113˚F (45˚C)
5˚F (–15˚C)
14˚F (–10˚C)
23˚F (–5˚C)
32˚F (0˚C)
35˚F (2˚C)
41˚F (5˚C)
44˚F (7˚C)
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