Unit installation

August 2012 Application Note 1024
©2012 Mitsubishi Electric US, Inc.
P a g e | 4
Figure 3. CN4YControls
Selecting setting #2 for Setup Function 123 on MHK1 (or Mode 23 on PAR-21MAAU)
allows Setup Function 125 on MHK1 (or Mode 25 on PAR21MAA) and CN4Y to be used
to control the indoor unit fan during defrost and error conditions as shown in Figure 3.
Table 2 and 3 lists the settings to be used to achieve the fan operation desired.
Table 2. Fan Operation Settings Depending on Supplemental Heat Location
Heater Installed in Duct
No heater installed in Duct
Use of CN4Y
Unused
Used
Heater is off
Fan ON
Fan OFF
Heater is on
Fan ON
Fan OFF
Table 3.Controller Settings for Fan Operation
Mode
Indoor Unit Fan Operation
Setup
function
for
MHK1
(PAR-
21)
Setting
Mode no.
MHK1
(PAR-21)
Setting
Controller
Initial
setting
Heating
Thermo -
OFF
[DEFROST]
or [ERROR]
Fan
control
Very low
Very low
123
(23)
2
125 (25)
1
О
Stop
Remote
controller
setting
123
(23)
2
125 (25)
2
·
Remote
controller
setting
Remote
controller
setting
123
(23)
2
125 (25)
3
·
Due to continuing improvement, above specification may be subject to change without notice.
2013 P-Series and M-Series - Application Notes (June 2013)
APP-78