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Troubleshooting by Remote Controller Display / LED Display
SiBE28-804
182
Troubleshooting
Troubleshooting
*1: Voltage measurement point
*2: “Pressure Sensor”, pressure / voltage characteristics table.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
NO
YES
YES
YES
YES
NO
YES
YES
NO
YES
NO
NO
NO
Open the stop valve.
Connect the connector
properly.
Connect the connector
properly.
Replace the group
thermistor.
Replace the pressure
sensor.
Replace the outdoor PC
board (A1P).
Correct the refrigerant
system defect.
∗
Replace the PC
board equipped
with resin case.
Is the stop valve open?
Is it in cooling operation?
(In cooling
operation)
(In heating
operation)
Remove the thermistor from the
outdoor PC board and measure
resistance between the pins (5)
and (6).
Is
the pressure
sensor (connector :
X17A) properly connected
to the outdoor
PC board?
Is
the heat
exchanger distribution pipe
thermistor (connector : X12A) properly
connected to the outdoor
PC board?
Measure voltage between
the connector pins (1) and
(3) above. (refer to *1)
Is
the relation
between low pressure
and voltage normal?
Is
it normal?
(See )
Check 11
Is low-pressure
abnormally low?
(refer to *2)
Check 7
Detected pressure
PH (MPa)
Output voltage V
-0.5
-0.5
0
0.5
1.0
2.0
3.0
1.5
2.5
0.5
1.5
2.5
3.5
0
1
2
3
4
V
DC
PH
PH = 1.38V-0.69
PH : Detected pressure (MPa)
V : Output Voltage (V)
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...