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Fujitsu ASU18RLQ Service Manual
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7
.
TROUBLE
SHOOTING
R410A
W
ALL
MOUNTED
type
INVER
TER
1.
When
the
unit
does
not
operate
at
all
(Operation
lamp
and
T
imer
lamp
do
not
light
up)
2.
Self
Diagnosis
Function
(Either
Operation
lamp
or
T
imer
lamp
is
blinking)
*
How
to
operate
the
self-diagnosis
function
*
Self-
diagnosis
table
and
Check
points
3.
Trouble
shooting
method
*
Serial
signal
check
*
IPM
protection
check
*
Refrigeration
cycle
diagnosis
40
42
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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