Determine Fan Airflow Setting During Indoor Thermo Off Conditions; Setting Outdoor Unit And Auxiliary Heat Switch Over Temperatures - Mitsubishi Electric City Multi PUMY-P36NHMU Technical & Service Manual

(4) Determine Fan Airflow 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 4-4 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. Incareasing
a
-12:
[10 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 = > 10 :) : the Outdoor unit runs in HP mode.
Stage 2 :(TH7 = 10: to -12:) : the Outdoor unit runs in HP mode with Auxiliary heating.
Stage 3 :(TH7 = < -12:) : Auxiliary heating only (Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on " On Ambient Increase"
Stage 3 :(TH7 = < 0 :) : Auxiliary heating only (Outdoor unit is OFF).
Stage 2 :(TH7 = > 0: to 20:) : Auxiliary heating with Outdoor unit in HP mode.
Stage 1 :(TH7 = > 20:) : Outdoor unit in HP mode only.
Fan speed Fan speed
setting setting
OFF ON
Very low
Low
Setting on
remote
controller
Stopped
b c
0: 10: 20:
[32 F] [50 F] [68 F]
Stage 1
Stage 2
Stage 3
TH7 = Outdoor Temperature
d
3
- Outdoor unit HP operation
- Defrost : Heater contact ON signal
- Other than defrost : Contact OFF
- Outdoor unit HP operation
- Heater contact ON signal
- Outdoor unit OFF (Standby)
- Heater contact ON signal