Sharp R-426H Service Manual Page 116
- Page / 194
- Table of contents
- BOOKMARKS
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2. Processes and functions
1
12
3
4
5
II - 12
❑ During the defrost cycle, STANDBY appears on the remote controller.
❑ *......Cold Draft Prevention may operate occasionally
Time Chart for Defrosting
Fig. 14
Fig. 13
COMPRESSOR
OFF OR LL
OFF
OR LL
Release of
Defrosting
Defrosting
Start
SOLENOID COIL
(4 WAY VALVE)
OUTDOOR FAN
(H or M)
INDOOR FAN
(SET SPEED)
“STANDBY”
INDICATOR
MAX. 9 MINUTES 1 MINUTE1 MINUTE
ON ON
ON
ON
ON
ON
ON
“STANDBY” APPEARS
1575_M_S
2-10 Defrosting Control, Outdoor Heat Exchanger Coil (Heating)
When the outdoor temperature is low, frost may form on the outdoor heat exchanger coil.
When this occurred, the defrosting system operates. The microprocessor in the outdoor
unit monitors the relationship between the temperature of the outdoor heat exchanger coil
and the outdoor temperature so it can defrost when necessary.
Occurs either when the temperature of C1 (the outdoor
heat exchanger coil) has reached 10°C or above,
or when the maximum defrosting time (9 minutes)
has elapsed.
Refer to time chart.
*Minimum continuous operating time by defrosting is 48 minutes (= 15 + 8 + 25).
Release of defrosting
Defrosting
Stand by time for defros:
25 minutes
Flow of Defrosting
Heating operation
No counting time for detecting
frost : 15 minutes
Detecting the frost
OUTDOOR COIL
TEMP. C1 (°C)
Y
“RELEASE OF
DEFROSTING”
RANGE
10
-13.7 10
OUTDOOR AIR TEMP.
(°C)
X
-3
-8
The area below the heavy line
is the frost detection area.
-20
Either continuous 8 minutes or cumulative 60 minutes
are required to detect frost in the “Frosting” range.
0441_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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