3.4.6 Defrosting:
(not available for cooling-only type air conditioner)
3.4.6.1 Defrost entry conditions
After the compressor running for more than 10 minutes.
A. Indoor unit enters into overload prevention and outdoor unit stops. When outdoor fan motor runs for more
than 10 minutes, and the build-up time of compressor running is for more than 50 minutes, Trc
≤
A-1
℃
and Toc
≤
-2
℃
( Toc: The outdoor coil temperature.)
B. Not overload, but Toc
≤
-17
℃
for 30 seconds. The build-up time of compressor running is for more than
25 minutes.
C. The build-up time of compressor running is for more than 3 hours. And Toc
≤
-2
℃
for 5 minutes. Trc
≤
G-2
℃
and Trc
≤
(Tr+H)
℃
.
D. The build-up time of compressor running is for more than 3 / 2 hours. And it reaches the condition of the
unit stopping. Toc drops blow -2
℃
for 3 minutes(overload).or Toc
≤
-2
℃
and Trc
≤
G+2
℃
(not
overload).
E. The build-up time of compressor running is for more than 50minutes.Toc
≤
-2
℃
, Trc drops at least 3
℃
and Trc
≤
G
℃
, Trc
≤
(Tr+H)
℃
.
F. Toc
≤
-2
℃
, the temperature decreases 1
℃
every 6 minutes (repeat for 3 times). The build-up running
time is for more than 25 minutes.
The air conditioner will defrost only one of the conditions is meet.
3.4.6.2 Defrosting:
Compressor, indoor and outdoor fan motor will stop working after the unit entering into defrost running.
55 seconds later, 4-way reversing valve will close. Another 5 seconds, compressor starts running. When the
time of the compressor running is for more than 10 minutes or Toc
≥
20
℃
, and defrosting time is for more
than 3 minutes, Compressor stops. 55 seconds later, 4-way reversing valve will open. Another 5 seconds
later, compressor and outdoor fan motor will restart working and exit defrosting operation. In defrosting
operation, the time of compressor running is at least 3 minutes. Cool-airflow-prevention and blowing residue
heat are both efficient.
3.4.7 Testing codes
code 1: to set test run; code 2: to set fast testing;
code 3: to set auto-diagnosis; code 4: to cancel the above setting;
3.4.8 Temperature and failure code display
The defining of code refers to the following:
Code 11: room temperature code 12: indoor coil pipe temperature
Code 13: outdoor coil pipe temperature code 14: abnormal information
E0: Normal operation P1: Cooling overload
P2: Heating overload F4: PG motor is abnormal
F1: The circuit of room temperature sensor is damaged or abnormal
F2: The circuit of indoor coiled temperature sensor is damaged or abnormal
F3: The circuit of outdoor coiled temperature sensor is damaged or abnormal
When temperature sensor or PG motor is damaged or abnormal, RUN indicator will flash.
