Panasonic U-8ME1E81 Service Manual page 38
2way vrf system
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Also See for U-8ME1E81:
- Service manual (106 pages) ,
- Installation instructions manual (220 pages) ,
- Operating instructions manual (180 pages)
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9. Defrost Control
9. Defrost Control
E
: Evaporator operation
C
: Condenser operation
S
: Stop or shut off the refrigerant
E→C
: Switching from evaporator operation to condenser operation
C→E
: Switching from condenser operation to evaporator operation
1
Control time
Defrost
occurs
first
Outdoor
unit(s)
Defrost
occurs
second
Mode
Stop
Fan
Indoor
units
Heating
*3 Only for High Static Pressure Ducted Type Indoor Unit (Type E1)
Indoor unit (expansion valve, fan)
Mode
Stop
Expansion
Fan
valve
Heating
Unit :
pulse
Stop
Fan
Fan
Heating
*3 Only for High Static Pressure Ducted Type Indoor Unit (Type E1)
*4 Fan operates at the set fan speed depending on the indoor unit operation mode.
Normal
Indoor unit
operation
-
Heat
E
exchanger
Compressor
ON
Fan
ON
Heat
E or S
exchanger
Compressor
ON or S
Fan
ON or S
Thermostat
S
S
ON
C
OFF
C
*3 OFF
S
Normal
operation
Thermostat
65
65
ON
SC control
OFF
65
*3 OFF
20
*4
*4
ON
*4
OFF
*4
*3 OFF
*4
Outdoor unit cycle defrost processing
1st
delay-start
Defrost
control
group
1 min
Max 7.5 min
E→C
C
ON
ON
OFF
OFF
E
E
OFF
OFF
ON
ON
S
S
S
S
C
C
C
C
S
S
Outdoor unit cycle defrost processing
1st
Indoor unit
Defrost
delay-start
group
control
60
20
60
20
SC control
60
60
60
20
20
*4
*4
*4
*4
*4
Stop
*4
*4
*4
LL
1 - 30
Control Functions - Outdoor Unit
Control Functions-Outdoor Unit
2nd
Switch
Defrost
Switch
group
1 min
Max 7.5 min
1 min
C→E
E
OFF
OFF
OFF
OFF
ON
OFF
E→C
C
C→E
OFF
ON
OFF
OFF
OFF
OFF
S
S
S
S
C
C
C
C
S
S
2nd
Defrost
Switch
Switch
group
20
20
20
20
60
60
60
60
20
20
*4
*4
*4
*4
Stop
Stop
*4
*4
LL
LL
2WAY SYSTEM
2WAY SYSTEM
Normal
operation
-
E
E
ON
ON
E or S
ON or S
ON or S
S
S
S
S
C
C
C
C
S
S
Normal
operation
20
20
20
20
60
SC control
60
65
20
20
*4
*4
*4
*4
Stop
*4
*4
*4
LL
*4
- Quick Links:
- Indoor Unit
- Outdoor Unit
- Service Manual
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