Sharp R-426H Service Manual Page 120
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- Table of contents
- BOOKMARKS
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2. Processes and functions
1
12
3
4
5
II - 16
2-15 Compressor Current Detection Circuit
❑ The Compressor Current Detection Circuit detects the compressor current and,
depending on the current range, can stop the compressor motor so it will not be
damaged by overcurrent.
❑ Overcurrent can be caused by several factors, particularly mechanical seizing of
the compressor or liquid backflow. Either of these conditions can hold the
compressor to run, and thus drawing so much current that the motor can burn
out.
Chart Summary and Explanations
❑ Overload Protection
• When the detected current is 1.17 – 1.4 times greater than the rated current value (Is) and continues
for 30 seconds, both compressor and outdoor fan stop (Thermostat OFF).
• After 3-minute pause, if the air conditioner is ready for Thermostat ON, it starts again. However, if the
condition mentioned above repeats twice within 30 minutes, the remote controller displays the alarm
message H01, compressor overload.
❑ Locked Compressor Cut-off
• When the detected current is 1.4 times greater than the rated current value (ls) and continues for 2
seconds, both compressor and outdoor fan stop (Thermostat OFF).
• After 3-minute pause, if the air conditioner is ready for Thermostat ON, it starts again. However, if the
condition mentioned above repeats twice, the remote controller displays the alarm message H02,
compressor locked.
❑ Failure of Compressor Current Detection
• When the Compressor Current Detection Circuit fails to detect the compressor current within 2
seconds after compressor starts, both compressor and outdoor fan stop (Thermostat OFF).
• After 3-minute pause, if the air conditioner is ready for Thermostat ON, it starts again. However, when
the circuit fails to detect the current twice in a row, the remote controller displays alarm message H03,
Failure of compressor Current Detection.
Fig. 18
Outdoor Model
Rated Current Value Overload Protection Locked Compressor Cut-off
ls (A) ls x 1.17 (A) Is x 1.4 (A)
SPW-CR253G(H)L5 23.1 27.0 32.3
SPW-CR253G(H)L8 7.1 8.31 9.94
SPW-CR363G(H)L8 10.3 12.05 14.42
SPW-CR483G(H)L8 13.6 15.9 19.0
Locked Comp. Cut-off Range
Overload Protection Range
Normal Operation Range
Comp. Amps.(A)
Is 1.17
Is 1.4
Is
Rated Current
value
+
+
0447_M_S
- TECHNICAL DATA 1
- SERVICE MANUAL 1
- Important 2
- WHO SHOULD USE THIS MANUAL 3
- TABLE OF CONTENTS 3
- Read Me First! 5
- 1-1 Unit Specifications 10
- 1-1Unit Specifications 30
- (B) Outdoor Unit 40
- Ceiling Mounted Type 47
- Concealed Duct Type 48
- Outdoor Unit 49
- 1-4 Dimensional Data 53
- 1-5 Refrigerant Flow Diagram 61
- 1-6 Operating Range 64
- 1-7 Cooling Capacity 65
- ● Heating Capacity 77
- 1-8 Noise Criterion Curves 78
- External Static Pressure 82
- Limit line 82
- 1-10 Air throw Distance Chart 83
- Tubing Length 85
- 0426_C_I 88
- 3 - ø40 hole 89
- 6 - ø6 hole 89
- 3 - ø60 hole 89
- 8 - ø6 hole 89
- Electrical Wiring 90
- 0511_M_I 91
- ■ Electrical Characteristics 93
- 1. Specifications 100
- Electrical Characteristics 100
- SM830080 105
- 2-1 Room Temperature Control 106
- SET SPEED 107
- 0673_X_S 108
- Chart Explanations and notes 109
- 2-4 Outdoor Fan Speed Control 110
- 2. Processes and functions 112
- 1566_M_S 114
- Fig. 14 116
- Fig. 13 116
- 0443_M_S 117
- (B) AUTO Control Mode 118
- (A) Cooling 119
- 0447_M_S 120
- 2-16 Dehumidifying Operation 121
- Auto-flap Control 122
- Ceiling-Mounted Type) 122
- 0451_M_S 123
- • Electric Wiring Diagram 126
- • Schematic Diagram 127
- This section explains: 139
- 0500_M_I 140
- 0499_M_I 141
- 0458_M_I 142
- 4. Service procedures 143
- (B) Heating 143
- 0654_C_I 146
- 1903_M_I 150
- 0340_M_I 151
- 0460_M_I 156
- 0652_M_S 157
- 0354_M_I 159
- Alarm message 160
- TEST RUN / CHECK button 160
- ON / OFF operation 160
- 0356_M_I 161
- Set CODE No. A1 with 165
- 0362_M_I 166
- (SET TEMP) button 168
- 0368_M_I 169
- 0639_X_S 173
- 0640_X_S 174
- 0641_X_S 174
- Multimeter 175
- 0643_X_S 176
- Indoor P.C.B. Ass’y 178
- Outdoor P.C.B. Ass’y 178
- 1251_X_I 179
- 1250_X_I 179
- • ACR 436 H - ACR 448 H 180
- Indoor Unit 180
- • ACR 425 H 180
- • ADR 425 H 181
- • ADR 436 H 181
- • ADR 448 H 181
- • AER 436 SHL3E 182
- Outdoor Units 182
- • AER 448 SHL3E 183
- Temperature (°C) 184
- 1577_C_I 188
- 1579_M_I 189
- 5. Appendix 190
- 5-1 P.C.B 191
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