131
Deice operation time diagram
a. Deice mode 1 control:
OD fan
ID pump
Expansion valve
Four way valve
Compressor
Free
Free
ON
OFF
OFF
N
O
N
O
Free
5
7
6
4
9
8
3
2
1
ON
ON
Free
Free
max 9 minutes 30 seconds
deice 1
b. Deice mode 2 control:
OD fan
OD fan
Main
Expansion valve
Bypass
Expansion valve
Four way valve
Sequence
Pump
Gas Bypass SV
Compressor
Deice mode 2
max 30 minutes
Normal
Deice
4~6
N
O
N
O
F
F
O
OFF
OFF
0
ON
ON
OFF
Free
Free
Free
Free
ON
OFF
OFF
1
2
3
4
5
6
7
8
Heating
operation
14.2.3 Force Defrost Operation
Force defrost can be set through remote control with two selection (Manual OR Auto).
If Manual defrost set, heat pump only run force defrost at heat mode when force defrost request from quick menu
remote control.
If Auto defrost set, heat pump automatically run force defrost operation after 3 hours heating accumulation time
without defrost when ambient below 5°C.