Mitsubishi Electric PUMY-P36NKMU2-BS 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
signal
Thermo condition
SW1-7 SW1-8
OFF OFF
ON OFF
OFF ON
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
−25-C
[−13-F]
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:]): the outdoor unit runs in HP mode.
Stage 2: (TH7 = 50 to −13°F [10 to −25:]): the outdoor unit runs in HP mode with auxiliary heating.
Stage 3: (TH7 = < −13°F [−25:]): 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:]): Auxiliary heating only (Outdoor unit is OFF).
Stage 2: (TH7 = > 32 to 68°F [0 to 20:]): Auxiliary heating with outdoor unit in HP mode.
Stage 1: (TH7 = > 68°F [20:]): Outdoor unit in HP mode only.
OCH695B
Fan speed Fan speed
setting setting
OFF ON
Very low
Low
Setting on
Setting on remote
controller
remote
controller
Stopped
b c
0-C 10-C 20-C
[32-F] [50-F] [68-F]
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
d
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