CONTROL SYSTEM
SM HHD 1-A.1 GB
12-9
12.13
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.
12.13.1
Indoor Coil Defrost Protection
Conditions for Start Controlling
Judge the controlling start with the ICT (Indoor Coil Temperature) after 2 sec from operation start.
During cooling operation, the signals being sent from the indoor unit allow the operating frequency
limitation and then prevent freezing of the indoor heat exchanger.
Compressor will stop when ICT < 0
o
C for continuous 3 mins.
the outdoor fan will stop after 30 seconds, and the indoor fan and swing motor will keep running in
the original mode.
When ICT>6°C and the compressor has stopped for 3 minutes, the compressor will resume running
in the original mode.
If the unit stops as such protection for 6 times, it can not resume running automatically and display
error code
E2
, it can resume by pressing ON/OFF.
During the operating, If compressor operates for more than 10min, the counter of stop operation
due to protection will be cleared.
12.13.2
Compressor over Heating Protection
The Discharging temperature is used as the compressor’s internal temperature. If the discharge
temperature rises above a certain level, the operating frequency upper limit is set to keep this
temperature from going up further.
When CTT> A
o
C compressor will stop.
When CTT< B
o
C and compressor has stopped for 3mins, the compressor will resume running in
the original mode.
When CTT
≥ B
o
C, the compressor will Stop Rise (SR) or decrease the frequency (HzDown)
Value
Model 09/12
Model 18/24
A
110
115
B
90
97
If the unit stops as such protection for 6 times, it can not resume running automatically and display
error Code
E4
, it can be resumed by pressing ON/OFF.
During the operating, If compressor operates for more than 10min, the counter of stop operation
due to protection will be cleared.
Summary of Contents for AWAU-YHD009-H11
Page 14: ...OUTLINE DIMENSION 4 2 SM HHD 1 A 1 GB 4 2 Outdoor YHD009 YHD012 4 3 Outdoor YHD018...
Page 15: ...OUTLINE DIMENSION SM HHD 1 A 1 GB 4 3 4 4 Outdoor YHD024...
Page 16: ...PERFORMANCE DATA SM HHD 1 A 1 GB 5 1 5 PERFORMANCE DATA 5 1 Model HHD009 YHD009 HHD012 YHD012...
Page 17: ...PERFORMANE DATA 5 2 SM HHD 1 A 1 GB 5 2 Model HHD018 YHD018 HHD018 YHD018...
Page 18: ...PRESSURE CURVES SM HHD 1 A 1 GB 6 1 6 PRESSURE CURVES TBD...
Page 20: ...SOUND LEVEL CHARACTERISTICS 7 2 7 2 Soud Pressure Level Spectrum Measured as Figure 1 TBD...
Page 22: ...WIRING DIAGRAMS SM HHD 1 A 1 GB 9 1 9 WIRING DIAGRAM 9 1 HHD009 HHD012 9 2 HHD018 HHD024...
Page 23: ...WIRING DIAGRAM 9 2 SM HHD 1 A 1 GB 9 3 YHD009 YHD012 9 4 YHD018 YHD024...