Defrost Control - Daikin FTX20JV1B Service Manual
Inverter pair wall mounted type j-series
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Also See for FTX20JV1B:
- Service manual (267 pages) ,
- Operation manual (26 pages) ,
- Installation manual (16 pages)
Table of Contents
Control Specification
3.10 Defrost Control
Outline
Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor
heat exchanger temperature must be more than a certain value to finish defrosting.
Detail
Conditions for Starting Defrost
Conditions for Canceling Defrost
The judgment is made with the outdoor heat exchanger temperature. (B°C)
A (minutes)
B (°C)
C (Hz)
D (Hz)
E (seconds)
F (seconds)
G (seconds)
H (seconds)
J (pulse)
K (pulse)
L (pulse)
M (pulse)
37
The starting conditions are determined with the outdoor temperature and the outdoor heat
exchanger temperature.
The system is in heating operation.
The compressor operates for 6 minutes.
More than A minutes of accumulated time pass after the start of the operation, or ending the
previous defrosting.
Frequency
ON
Compressor
OFF
ON
Four way valve
OFF
ON
Fan
OFF
Electronic expansion
valve opening
20/25 class
28
4 ~ 22
68
80
80
60
510
100
450
400
430
450
C Hz
0 Hz
F sec.
E sec.
G sec.
5 sec.
J pulse
L pulse
K pulse
35 class
28
4 ~ 22
72
84
80
60
510
70
450
400
430
450
D Hz
0 Hz
H sec.
5 sec.
M pulse
Initial opening
Function and Control
SiBE041010EA
PI control
(R18152)
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