PCB LED
1 to 6
LCD
LED display
Cause
Remote
controller
Indoor
unit
Outdoor
unit
– 120–
Controlling
display
(Operation
display LED
flashing)
Controlling
display
(Defrosting
operation)
Normal
display
Defrosting operation in progress Outdoor unit heat exchanger
extremely cold (-5 C or less)
repeats 3 seconds ON, 1 second
OFF cycle.
Error display
(Outdoor unit
error display)
Error display
(Compressor
error)
Error display
(Outdoor
unit error)
Compressor faulty
Voltage (AC380-415V) is applied
to secondary side of power line,
but compressor does not operate.
While checking for a compressor
error, the other compressors
perform the backup operation.
Resistance across compressor
wires : 5 each.
Compressor faulty
Compressor lock
When the compressor does not
operate, measure the resistance
across the compressor wires and
the ground resistance.
(When the compressor is locked,
the resistance across the wires
and the ground resistance will be
the normal value, the same as
when the compressor is stopped.)
When this trouble occurs, the oil
in the compressor has
deteriorated (changed to black
color).
Compressor faulty
Compressor motor burned
When the compressor does not
operate, measure the resistance
across the compressor wires and
the ground resistance.
(When the motor is burned, the
resistance across wires
increases / open and the ground
resistance drops.)
When this trouble occurs, the oil
does not deteriorate.
Therefore, operation can be
continued, but since the
possibility of electric leakage is
high, the compressor power line
must always be disconnected.
Error display
(Outdoor
unit error)
Error display
(Reverse
phase error)
Error display
(Outdoor
unit error)
Compressor faulty
The compressor operates
normally, but the high pressure
does not rise.
Reverse phase
The compressor wiring is red-R,
white-S, and black-T.
Error display
(Communi-
cation
error)
Error display
(Communi-
cation
error)
Error display
(Communi-
cation
error)
Normal after power reset.
Outdoor unit communication
PCB faulty.
When outdoor unit power reset
is repeated, a communication
error is generated.
When the display returns to
normal (not communicating)
after reset, the communication
PCB or communication line is
abnormal.
No display
or error
display
(Cannot be
specified)
Cannot be
specified.
No display
or error
display
(Cannot be
specified)
Indoor unit fan
not operating.
Indoor unit
makes an
abnormal
sound.
Indoor unit control PCB faulty.
The symptom has many
branches, depending on the
error contents, and there is no
effective check method.
When the PCB or the connection
wiring is faulty, operation can
often be restored by replacing
the PCB.
Cannot be
specified.
No display or
error display
(Cannot be
specified)
Cannot be
specified.
Indoor unit fan
not operating.
Indoor unit
makes an
abnormal
sound.
Outdoor unit control PCB faulty.
The symptom has many
branches, depending on the
error contents, and there is no
effective check method.
When the PCB or the connection
wiring is faulty, operation can
often be restored by replacing
the PCB.
Remarks
Check method
(Error state check method)
Operation display LED
Compressor motor burned
Compressor lock
Therefore, long-term operation
is impossible.
(Another compressor locks.)
Symptom that
can occur other
than title
1
2
1
bottom of set temperature display
position.
DEFROST is displayed at
2
Body
LED
Summary of Contents for AirStage AB12
Page 76: ...MODELS AB30 AB36 AB45 AB54 RB UNIT For Heat Recovery only 7 2 LARGE CEILING TYPE 76 ...
Page 77: ...MODELS AR7 AR9 AR12 AR14 AR18 RB UNIT For Heat Recovery only 7 3 COMPACT DUCT TYPE 77 ...
Page 79: ...MODELS AR36H AR45H AR60H RB For Heat Recovery only UNIT 7 5 HIGH STATIC PRESSURE DUCT TYPE 79 ...
Page 80: ...MODELS AU7 AU9 AU12 AU14 AU18 RB UNIT For Heat Recovery only 7 6 COMPACT CASSETTE TYPE 80 ...
Page 81: ...MODELS AU20 AU25 AU30 AU36 AU45 AU54 RB UNIT For Heat Recovery only 7 7 NEW CASSETTE TYPE 81 ...
Page 82: ...MODELS 7 8 WALL MOUNTED TYPE AS14 20 24 30 82 ...
Page 83: ...MODEL AOY90 7 9 OUTDOOR UNIT 83 ...
Page 134: ...Models AOY90TPAMF 134 10 DISASSEMBLY ILLUSTRATION ...
Page 135: ...Models AOY90TPAMF 135 ...
Page 137: ...Models AOY90TPAMF 137 ...
Page 142: ...Models ABY12TFAMF ABY14TFAMF 755 653 1 581 338 67 56 56 164 109 126 ABY18TFAMF ABY24TFAMF 142 ...
Page 149: ...Models ABY12TFAMF ABY14TFAMF 755 653 1 581 338 67 56 56 164 109 126 ABY18TFAMF ABY24TFAMF 142 ...
Page 155: ...Models ABY30TFAMF ABY36TFAMF ABY45TFAMF 407 876 1 505 408 435 434 506 3 ABY54TFAMF 148 ...
Page 156: ...Models ABY30TFAMF ABY36TFAMF ABY45TFAMF 387 160 91 91 91 321 386 361 ABY54TFAMF 149 ...
Page 162: ...Models AUY20TFAMF AUY25TFAMF AUY30TFAMF AUY36TFAMF AUY45TFAMF AUY54TFAMF 155 ...
Page 164: ...Models AUY25TLAMA AUY30TLAMA AUY36TLAMA AUY45TLAMA 157 ...
Page 167: ...Models ARY25TFAMF ARY30TFAMF ARY36TFAMF ARY45TFAMF 160 ...
Page 169: ... 162 Model ARY7TFAMF ARY9TFAMF ...
Page 170: ...Model ARY7TFAMF ARY9TFAMF 163 875 ...
Page 171: ...Model ARY12TFAMF ARY14TFAMF ARY18TFAMF 164 431 918 918 163 2 184 1 147 ...
Page 172: ...Model ARY12TFAMF ARY14TFAMF ARY18TFAMF 165 ...
Page 173: ...Model ARY12TFAMF ARY14TFAMF ARY18TFAMF 166 ...
Page 179: ...Model ASY20TFAMF ASY24TFAMF ARY30TFAMF 172 91 876 1 407 1 407 2 407 3 69 ...
Page 199: ...1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan Jan 2002 Printed in Japan ...