CONTROL SYSTEM
When the unit is operating in low frequency for long time, the compressor will be forced to
decrease frequency for 4 min to make sure the oil, which accumulated into the system, back to
compressor.
During the oil return operation, the IDU has no any indication
11.8
Protections
There are 4 protection codes.
Normal (Norm) – unit operate normally.
Stop Rise (SR) – compressor frequency can not be raised but does not have to be decreased.
HzDown – Compressor frequency is reduced by 2Hz/s
Stop Compressor (SC) – Compressor is stopped.
11.8.1
Indoor Coil Defrost Protection
Conditions for Start Controlling
Judge the controlling start with the ICT (Indoor Coil Temperature) in cool and dry mode after
compressor is on for 15min to allow the operating frequency limitation and then prevent freezing of
the indoor heat exchanger.
Compressor will stop when ICT <= ICT
defrost
for continuous 3 mins
,
it can resume running
automatically when ICT >=10.
Model ICT
defrost
Duct -2
Floor ceiling
-4
Cassette -5
11.8.2
High Pressure Protection of Compressor by high pressure
switch
When high pressure protection is detected for 3 seconds continuously, the high pressure switch is
4.2Mpa, the unit will stop and report the fault, it can not resume running automatically and display
malfunction, it can resume by pressing ON/OFF.
11.8.3 Compressor
over Heating Protection
If the discharge temperature rises above a certain level, the operating frequency upper limit is set
to keep this temperature from going up further.
Compressor will stop when CTT reaches 130.
The unit can only
resume running
until the compressor has stopped for 3 minutes and the
CTT is lower than 90
℃
If the unit stops as such protection for 3 times, it can not resume running automatically and display
malfunction, it can resume by pressing ON/OFF.
11.8.4
Compressor over Current Protection
Detect an input current by the CT during the compressor is running, and set the frequency upper
limit from such input current. In case of heat pump model, this control is the upper limit control
function of the frequency which takes priority of the lower limit of four way valve activating
compensation.
SM YUD 2-A.1 GB
11-7
Model Current(A)
24 45
Содержание YUD024
Страница 28: ...OUTLINE DIMENSIONS 4 4 SM YUD 2 A 1 GB 4 5 3 Outdoor unit YUD 048 060 ...
Страница 48: ...WIRING DIAGRAMS SM YUD 2 A 1 GB 8 1 8 WIRING DIAGRAMS 8 1 AWAU YUD024 H11 AWAU YUD030 H11 ...
Страница 49: ...WIRING DIAGRAMS 8 2 SM YUD 2 A 1 GB 8 2 AWAU YUD036 H11 ...
Страница 50: ...WIRING DIAGRAMS 8 3 AWAU YUD036 H13 AWAU YUD042 H13 SM YUD 2 A 1 GB 8 3 ...
Страница 51: ...WIRING DIAGRAMS 8 4 SM YUD 2 A 1 GB 8 4 AWAU YUD048 H13 AWAU YUD060 H13 ...
Страница 52: ...WIRING DIAGRAMS SM YUD 2 A 1 GB 8 5 8 5 AWSI CAD024 N11 ...
Страница 53: ...WIRING DIAGRAMS 8 6 SM YUD 2 A 1 GB 8 6 AWSI CAD030 036 042 N11 ...
Страница 54: ...WIRING DIAGRAMS 8 7 AWSI FAD024 N11 SM YUD 2 A 1 GB 8 7 ...
Страница 55: ...WIRING DIAGRAMS 8 8 SM YUD 2 A 1 GB 8 8 AWSI FAD030 036 048 N11 ...
Страница 56: ...WIRING DIAGRAMS 8 9 AWSI DBD024 030 036 048 060 N11 SM YUD 2 A 1 GB 8 9 ...
Страница 57: ...REFRIGERATION DIAGRAMS SM YUD 2 A 1 GB 9 1 9 REFRIGERATION DIAGRAMS 9 1 Cooling Mode 9 2 Heating Mode ...
Страница 79: ...SPARE PARTS LIST 13 3 Exploded view of Indoor unit DBD024 060 SM YUD 2 A 1 GB 13 3 ...
Страница 81: ...SPARE PARTS LIST 13 5 Exploded view of Indoor unit DBD036 SM YUD 2 A 1 GB 13 5 ...
Страница 83: ...SPARE PARTS LIST 13 7 Exploded view of Indoor unit DBD060 SM YUD 2 A 1 GB 13 7 ...
Страница 85: ...SPARE PARTS LIST 13 9 Exploded view of Indoor unit CAD024 SM YUD 2 A 1 GB 13 9 ...
Страница 87: ...SPARE PARTS LIST SM YUD 2 A 1 GB 13 11 13 11 Exploded view of Indoor unit CAD030 ...
Страница 89: ...SPARE PARTS LIST 13 13 Exploded view of Indoor unit CAD036 042 SM YUD 2 A 1 GB 13 13 ...
Страница 92: ...SPARE PARTS LIST 13 16 SM YUD 2 A 1 GB 13 16 Exploded view of Indoor unit FAD024 ...
Страница 94: ...SPARE PARTS LIST 13 18 SM YUD 2 A 1 GB 13 18 Exploded view of Indoor unit FAD030 036 ...
Страница 97: ...SPARE PARTS LIST 13 21 Exploded view of Indoor unit FAD048 SM YUD 2 A 1 GB 13 21 ...
Страница 99: ...SPARE PARTS LIST 13 23 Exploded view of outdoor unit YUD024 030 SM YUD 2 A 1 GB 13 23 ...
Страница 101: ...SPARE PARTS LIST 13 25 Exploded view of outdoor unit YUD036 SM YUD 2 A 1 GB 13 25 ...
Страница 103: ...SPARE PARTS LIST 13 27 Exploded view of outdoor unit YUD036T YUD042 SM YUD 2 A 1 GB 13 27 ...
Страница 105: ...SPARE PARTS LIST 13 29 Exploded view of outdoor unit YUD048 060 SM YUD 2 A 1 GB 13 29 ...
Страница 107: ...APPENDIX 14 APPENDIX APPENDIX SM YUD 2 A 1 GB 14 1 ...