Sharp R-426H Service Manual Page 114
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- Table of contents
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2. Processes and functions
1
12
3
4
5
II - 10
Chart Summary and Explanations
❑ Discharge temperature is sensed by TH8 (discharge gas sensor).
❑ When the temperature rises above 95°C the electronic refrigerant control valve opens at 50
steps/30 seconds until the temperature falls below 93°C.
❑ During HEATING operation, when the temperature rises above 105°C, the control circuit
stops the outdoor fan motor until the temperature falls below 90°C. Please note that this
control does not function during COOLING operation.
❑ For both COOLING and HEATING modes, if the temperature reaches 115°C (135°C for 48
type) the operation shuts down and alarm P3 appears on the remote controller.
❑ The outdoor fan speed is controlled on discharge temp. at heating mode.
Fig. 11
2-9 Auto. Mode for Automatic Heating/Cooling Switching
❑ When the AUTO mode is selected, the microprocessor calculates the difference
between the set temperature and the room temperature, and automatically
switches to the COOLING or HEATING mode to maintain the desired
temperature.
Room temp. ] Set temp. ➔ COOLING
Room temp. < Set temp. ➔ HEATING
This means that if the room temperature is higher or equal to the set
temperature, COOLING operation starts. If the room temperature is lower than
the set temperature, HEATING operation starts.
2-8 Discharge Temperature Control (Cooling and Heating)
This function prevents the compressor motor from burn out by overheating.
OUTDOOR
FAN SPEED
DISCHARGE GAS
TEMP. (°C)
115
105
95
93
90
85
COMPRESSOR
ELECTRONIC
EXPANSION VALVE
(DISCHARGE TEMP.)
TRIP IS OPERATED.
H or M
L
1566_M_S
OPENOPEN
H or M
ON
- 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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