Sharp AE-X9PSR - General Troubleshooting Chart

SHARP(CHINA)INVESTMENT CO.,LTD
TEMP.
Rmin
(k Ohm)
R(t)
(k Ohm)
Rmax
(k Ohm) TEMP.
Rmin
(k Ohm)
R(t)
(k Ohm)
Rmax
(k Ohm) TEMP.
Rmin
(k Ohm)
R(t)
(k Ohm)
Rmax
(k Ohm)
14 30.04 32.71 35.58 68    122 0.6631 0.7195 0.7572
15 29.72 31.24 33.95 69    123 0.6649 0.7007 0.7378
16 70 3.339 3.476 3.616 124 0.6472 0.6824 0.7189
17    71 3.229 3.359 3.491 125 0.6301 0.6647 0.7006
18 25.13 27.26 29.55 72 3.122 3.246 3.372 126 0.6135 0.6476 0.6829
19 24.05 26.07 28.23 73 3.02 3.138 3.257 127 0.5974 0.6309 0.6657
20 23.02 24.93 26.97 74 2.921 3.033 3.146 128 0.5818 0.6148 0.649
21 22.04 23.84 25.77 75 2.827 2.933 3.04 129 0.5667 0.5991 0.6328
22 21.1 22.81 24.63 76 2.735 2.836 2.938 130 0.5521 0.5839 0.6171
23 20.21 21.83 23.55 77 2.647 2.743 2.84    
R—Resistance
Rrsistance at 25
ć
20 k
TH3: Outdoor unit discharge pipe thermistor
Before measuring resistance,disconnect connectors as shown above.
[4] GENERAL TROUBLESHOOTING CHART
1. Indoor unit does not turn on
2. Indoor unit fan does not operate
3. Indoor unit fan speed does not change
Main cause Inspection method Normal value/condition Remedy
Cracked PCB.
(Cracked pattern)
Check visually. There should be no cracking in
PCB or pattern.
Replace PCB.
Open-circuit in FU1 (250 V, 3.15A). Check melting of FU1. There should be no open-circuit. Replace PCB.
Main cause Inspection method Normal value/condition Remedy
Refer to themistor temperature
characteristic
Replace thermistor.
Open-circuit in heat exchanger ther-
mistor (TH2)
Measure thermistor resistance
(dismount for check).
There should be no open-circuit
or faulty contact.
Replace thermistor.
Disconnected heat exchanger ther-
mistor (TH2)
Inspect connector on PCB.Check
thermistor installation con-dition.
Thermistor should not be
disconnected.
Install correctly.
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