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AB12
Fujitsu AB12 User Manual
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Ð
12
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SW2-3 setting is forbidden.
3
Maintenance.
Used for indication of the refrigerant system, indoor unit address and error history.
4
MAINTENANCE SWITCH
Mode
Normal mode
SW2-4
ON
Maintenance mode
OFF
SW2-5 setting is forbidden.
5
Battery backup switch.
When installing, turn the SW2-6 ON.
6
– 37
–
36
38
Table of Contents
Default Chapter
3
Table of Contents
3
1 Outline of System
5
Model Construction
5
System Construction Conditions
7
Refrigerant Piping
7
System Wiring
12
Address Setting
13
Kinds of Address and Setting Range
13
2 Test Run Adjustment
19
Check Items before Test Run
19
Test Run Method
19
Outdoor Pc Board
20
Test Operation Using Remote Controller
20
Test Run Control
22
3 Refrigerant Pipe System Diagram
23
Cooling Only / Heat Pump Type
23
Heat Recovery Type
24
4 Function of Printed Circuit Board
25
Pcb Layouts
25
Microprocessor Block Diagram
26
Microprocessor Function List
28
Function and Setting of each Switch
30
Indoor Unit
30
Outdoor Unit
34
Remote Controller
36
5 Outdoor Unit Operation Control
43
Compressor Operation Control
43
Operation Stop Condition
43
Compressor Output Pattern
43
Minutes Restart Prevention (3 Min St)
43
Compressor Recovery Operation
44
Heat Exchanger Capacity Control
45
Outdoor Fan Motor Control
46
Expansion Valve 1/2 Control
48
Four-Way Valve 1 Control
49
Circulating Save Amount Control
50
Solenoid Valve 2 Control
51
Four-Way Valve 5 Control
52
Defrosting Control
53
Oil Return Control
54
Oil Recovery Control
55
Protection Function
56
Pump down Control
57
6 Indoor Unit Operation
59
Timer Control
59
Fan Control
64
Auto" Position
64
Low" "Med" and "High" Position
64
Master Control
65
Operation Mode Control
65
Cool" Position
69
Heat" Position
69
Fan" Position
70
Louver Control
71
7 Wiring Diagram
74
Electronic Expansion Valve Control
74
Auto Restart
74
Drain Pump Operation
74
Indoor Unit
74
Outdoor Unit
83
8 Troubleshooting
84
Indoor Unit
84
Normal Operation Display
84
Abnormal Operation Display
85
Outdoor Unit
88
Normal Operating Display
88
Abnormal Operation Display
89
Remote Control Unit
90
Error Code & Troubleshooting
91
Indoor Unit Troubleshooting
91
Outdoor Unit Troubleshooting
96
Central Remote Controller Troubleshooting
109
Troubleshooting (no Error Code)
114
Others 1
115
Others
124
Characteristics of Thermistor
124
Pressure Sensor
126
Electric Expansion Valve
126
Rb Unit (Heat Recovery Type Only)
126
Others
126
9 In Use of the New Refrigerant R407C
129
10 Disassembly Illustration
134
11 Parts List
180
5
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Fujitsu AB12 Specifications
General
Brand
Fujitsu
Model
AB12
Category
Air Conditioner
Language
English
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