Mitsubishi Electric PUMY-P36NKMU4 Technical & Service Manual page 6

(4) Determine fan speed setting during indoor thermo-OFF conditions:
a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options.
b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller".
Auxiliary heating Fan speed
signal
Thermo contidion
SW1-7 SW1-8
OFF OFF
ON OFF
OFF ON Setting on remote
ON ON
(5) Setting outdoor unit and auxiliary heat switch over temperatures
When the DIPSW 5-4 is set to "ON", the outdoor unit and the contact output operates as shown below.
a)Outdoor default setting and operations are shown below:
Amb. decreasing
Amb. increasing
a
b
−13°F
32°F
[−25°C]
[0°C]
When the set temperature ranges overlap, the previously set pattern (1, 2 or 3) has a priority.
The stage 1 has the highest priority, 2 the second and then 3.
b) Based on above chart listed the sequence of operation on "On ambient decrease"
Stage 1: (TH7 ≥ 50°F [10˚C]): the outdoor unit runs in HP mode.
Stage 2: (TH7 = 50 to −13°F [10 to −25˚C]): the outdoor unit runs in HP mode with auxiliary heating.
Stage 3: (TH7 ≤ −13°F [−25˚C]): Auxiliary heating only (Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on "On ambient increase"
Stage 3: (TH7 ≤ 32°F [0˚C]): Auxiliary heating only (Outdoor unit is OFF).
Stage 2: (TH7 ≥ 32 to 68˚F [0 to 20˚C]): Auxiliary heating with outdoor unit in HP mode.
Stage 1: (TH7 ≥ 68˚F [20˚C]): Outdoor unit in HP mode only.
OCH811A
Fan speed
setting setting
OFF ON
Very low Setting
on remote
controller
Low
controller
Stopped
c d
50°F 68°F
[10°C] [20°C]
IC3
OC
RA17°C
20°C
Thermo - ON
Stage 1
- Outdoor unit HP operation
- Defrost : Heater contact ON signal
- Other than defrost : Contact OFF
Stage 2
- Outdoor unit HP operation
- Heater contact ON signal
Stage 3
- Outdoor unit OFF (Standby)
- Heater contact ON signal
TH7 = Outdoor temperature
6
IC2
IC1
RA19°C
RA21°C
20°C 20°C
Thermo - OFF
Thermo - ON
Baseboard Heating