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ASU18RLQ
Fujitsu ASU18RLQ Service Manual
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REFRIGERANT
SYSTEM
DIAGRAM
2-Way
valve
Strainer
Strainer
Sub-heat
exchanger
(
INDOOR
)
3-Way
valve
Muffler
4-Way
valve
Expansion
valve
Heat
exchanger
(
INDOOR
)
Heat
exchanger
(
OUTDOOR
)
Sub-accumulator
Compressor
Cooling
Heating
ASU18RLQ/
AOU18RLQ
Models
:
ASU15RLQ
/
AOU15RLQ
03-01
9
11
Table of Contents
Table of Contents
2
Specification
4
Dimensions
7
Refrigerant System Diagram
9
Circuit Diagram
11
Description of each Control Operation
13
Cooling Operation
14
Heating Operation
15
Dry Operation
16
Auto Changeover Operation
17
Indoor Fan Control
18
Outdoor Fan Control
20
Louver Control
21
Compressor Control
22
Timer Operation Control
23
Electronic Expansion Valve Control
25
Test Operation Control
25
Prevent to Restart for 3 Minutes ( 3 Minutes St )
25
Four-Way Valve Extension Select
25
Auto Restart
25
MANUAL AUTO OPERATION (Indoor Unit Body Operation)
26
Forced Cooling Operation
26
Compressor Preheating
26
Coil Dry Opeartion Control
26
Defrost Operation Control
27
Off Defrost Operation Control
29
Various Protections
30
Refrigerant Caution -R410A
32
R410A Tools
33
Precaution for Installation
34
Precaution for Servicing
36
New Refrigerant R410A
37
Defference from Conventional Model(R22) and Precautions
40
Trouble Shooting
41
When the Unit Does Not Operate at All
41
Self Diagnosis Function
43
Trouble Shooting Method
50
Ipm Protection
50
Trouble Shooting of Refrigerant Cycle
50
Appending Data
51
Jumper Setting of Indoor Unit and Outdoor Unit
51
Outdoor Unit Pressure Value and Total Electric Current Curve
51
Thermistor Resistance Values
57
Capacity/Input Data
58
Replacement Parts
62
Installation Manual
70
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Fujitsu ASU18RLQ Specifications
General
Brand
Fujitsu
Model
ASU18RLQ
Category
Air Conditioner
Language
English
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