Overview Of Units; Auxiliary Heating On/Off Control Set-Up - Mitsubishi PUMY-P60NKMU Technical & Service Manual

2

OVERVIEW OF UNITS

2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP

(1) Auxiliary heating operation controls another heat source that depends on the main system's operations,
which means the interlock operation shown in "b)" will be possible.
a) Indoor unit must be R410A UL model for this function to operate.
b) Different Indoor unit applications that can be applied:
(2) Outdoor unit DIPSW5-4 for auxiliary heating control:
Set DIPSW5-4 when power is turned off at unit.
OFF: Disable auxiliary Heating Function (Initial setting)
ON : Enable auxiliary Heating Function
(3) Determine required indoor fans speed during defrost mode:
a) With no auxiliary heating output the Indoor fan normally goes off to prevent cold drafts during the defrost cycles.
b) With auxiliary heating control the auxiliary heat will be on during defrost mode, thus cold drafts will not be present.
(Ducted units only)
c) For models PEFY and PDFY (Ducted) recommended to use "Black" (20K) connector.
d) For models PLFY, PCFY, PKFY and PFFY (Ductless) recommended "None", no connector required.
e) To set the fan airflow rate to be used during defrost operation, insert the resistance that is packed within the optional
adaptor cable kit (PAC-YU24HT-F) into the CN22 sensor input.
You can choose at what speed the indoor fan operates during defrost cycles bases on chart below.
Fan airflow rate setting
During defrost operation
CN22 input resistance ( )
CN22 input (cable color)
Fan speed setting
Note: The setting will be disabled "when Heater contact signal is OFF".
OCH502C
OFF
0 20k 27k
None Black Blue
Setting on
Stopped remote Very Low
controller
5 5
ON
39k 62K
White Red
Low High
Wiring