12-5
CONTROL SYSTEM
SM DELTA 1-E.0 GB
12.4.5 Protections
•
High pressure protection is applicable to all operating modes.
•
Deicing control is valid in Heat and Auto Heat Mode only.
•
Defrosting control is valid in Dry, Cool, Heat and Auto Modes.
•
No reset after protection modes.
12.4.6 Thermistors
operation
•
Return air Temp. is detected by RAT (RT1) in normal Mode, or by RCT (R/C sensor)
in I-FEEL Mode.
•
Indoor Coil Temp. is detected by ICT (RT2).
12.4.6.1
Definition of thermistor faults:
a. Thermistor is disconnected -
The thermistor reading is below -30
o
c.
b. Thermistor is shorted -
The thermistor reading is over 75
o
c.
c.
Thermistor Temp reading doesn’t change (irrelevant for RT1) -
(i) This test is performed only once after a unit is switched from
OFF/STBY to operation. At the first occurrence of 10 min
continuous COMP operation, the current ICT & OCT are
compared with those when the COMP was switched from OFF
to ON 10 min before. If the
Δ
T is less than 3
o
c, the thermistor is
regarded as defective.
(ii) The ICT and OCT no-change error can be disabled together by
connecting a4.7 kohm resistor (5%) to the OCT connector. These
resistors are equivalent to a thermistor at 43+/-1
o
c and 48+/-1
o
c
respectively.
(iii) Connecting a 4.7k resistor to the ICT connector will disable the
ICT no-change error only.
Summary of Contents for DELTA 18
Page 14: ...4 2 OUTLINE DIMENSIONS SM DELTA 1 E 0 GB 4 3 Outdoor Unit OU7 24 OU7 24Z...
Page 21: ...5 7 PERFORMANCE DATA PRESSURE CURVES SM DELTA 1 E 0 GB 5 6 Pressure Curves 5 6 1 Cooling...
Page 22: ...5 8 PERFORMANCE DATA PRESSURE CURVES SM DELTA 1 E 0 GB 5 6 2 Heating...
Page 31: ...8 1 WIRING DIAGRAMS SM DELTA 1 E 0 GB 8 WIRING DIAGRAMS 8 1 Indoor Unit DELTA 18 21 24...
Page 32: ...8 2 WIRING DIAGRAMS SM DELTA 1 E 0 GB 8 2 Outdoor Unit GC 18 1PH R410A...
Page 33: ...8 3 WIRING DIAGRAMS SM DELTA 1 E 0 GB 8 3 Outdoor Unit GC 24 1PH R410A...
Page 34: ...8 4 WIRING DIAGRAMS SM DELTA 1 E 0 GB 8 4 Outdoor Unit OU7 24 1PH R410A...
Page 35: ...8 5 WIRING DIAGRAMS SM DELTA 1 E 0 GB 8 5 Outdoor Unit OU7 24 3PH R410A...
Page 36: ...8 6 WIRING DIAGRAMS SM DELTA 1 E 0 GB 8 6 Outdoor Unit OU7 24Z R410A...
Page 39: ...10 2 REFRIGERATION DIAGRAMS Service Manual ALPHA 10 1 2 DELTA 24 OU7 24 R410A...
Page 40: ...10 3 REFRIGERATION DIAGRAMS SM DELTA 1 E 0 GB 10 1 3 DELTA 24 OU7 24Z R410A...
Page 81: ...14 3 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 3 Outdoor Unit GC 18 ST...
Page 83: ...14 5 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 5 Outdoor Unit GC 18 RC...
Page 85: ...14 7 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 7 Outdoor Unit GC 21 RC...
Page 87: ...14 9 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 9 Outdoor Unit GC 21 ST...
Page 89: ...14 11 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 11 Outdoor Unit GCN 12 RC...
Page 91: ...14 13 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 13 Outdoor Unit GC 24 RC...
Page 93: ...14 15 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 15 Outdoor Unit OU7 24 RC 1PH...
Page 95: ...14 17 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 17 Outdoor Unit OU7 24 ST 1PH...
Page 99: ...14 21 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 21 Outdoor Unit OU7 24 RC 3PH...
Page 101: ...14 23 EXPLODED VIEWS AND SPARE PARTS LISTS SM DELTA 1 E 0 GB 14 23 Outdoor Unit OU7 24 ST 3PH...
Page 106: ...15 4 OPTIONAL ACCESSORIES SM DELTA 1 E 0 GB...
Page 107: ...15 5 OPTIONAL ACCESSORIES SM DELTA 1 E 0 GB...
Page 108: ...15 6 OPTIONAL ACCESSORIES SM DELTA 1 E 0 GB...