Panasonic U-72MF2U9 Service Manual page 45

9. Defrost Control
● Indoor unit (expansion valve, solenoid valve kit, fan)
Mode Thermostat
Stop *1(Cooling)
*2(Heating)
Fan *1(Cooling)
Expansion
valve
*2(Heating)
ON
Cooling
OFF
ON
Heating OFF
Unit :
pulse *3 OFF
Stop *1(Cooling)
*2(Heating)
*5
Fan *1(Cooling)
Solenoid
*2(Heating)
valve
ON
kit
Cooling
OFF
ON
Heating OFF
*3 OFF
Stop *1(Cooling)
*2(Heating)
Fan *1(Cooling)
Fan *2(Heating)
ON
Cooling
OFF
ON
Heating OFF
*3 OFF
*1 Function when a common use solenoid valve kit is used and there are more than one (1) indoor unit in the
cooling mode within the same solenoid valve kit.
*2 Function when a common use solenoid valve kit is used and there are more than one (1) indoor unit in the
heating mode within the same solenoid valve kit.
*3 Only for Concealed Duct - High Static Type Indoor Unit (Type E1)
*4 Fan runs at the set fan speed depending on the indoor unit operation mode.
*5 Individual number for DSBE indicates the status (OFF/ON) in turn from left respectively.
0 : OFF
1 : ON
Normal
Indoor unit
operation
delay-start
control
-
20 20
20 20
55 55
-
20 20
20 20
55 55
SH control SH control SH control SH control SH control SH control SH control
20 20
SC control SC control
55 55
20 20
-
0010 0010
0111 0111
1000 0000
-
0010 0010
0111 0111
1000 0000
0111 0111
0111 0111
1000 0000
1000 0000
0000 0000
-
*4 *4
*4 *4
*4 *4
-
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
Outdoor unit cycle defrost processing
1st
Defrost Switch
group
20 20
20 20
60 60
20 20
20 20
60
60
20 20
60 60
60 60
20 20
0010 0010
0111 0111
0000 0000
0010 0010
0111 0111
0000 0000
0111 0111
0111 0111
0000 0000
0000 0000
0000 0000
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
*4 *4
Stop Stop
*4 *4
LL LL
1 - 37
3WAY VRF SYSTEM
Control Functions
Normal
2nd
operation
Defrost Switch
group
20 20 20
20 20 20
60
60 55
20 20 20
20
20 20
60 60
55
20 20 20
60 60 SC control
60 60 55
20 20 20
0010 0010 0010
0111 0111 0111
0000 0000 0000
0010 0010 0010
0111 0111 0111
0000 0000 0000
0111 0111 0111
0111 0111 0111
0000 0000 1000
0000 0000 1000
0000 0000 0000
*4 *4 *4
*4 *4 *4
*4 *4 *4
*4 *4 *4
*4 *4 *4
*4 *4 *4
*4 *4 *4
*4 *4 *4
Stop Stop
*4
*4 *4 *4
LL LL
*4
1
2
3
4
5
6
7
8
9