Electrical Control Function
Electrical Control System 87
If the current frequency is lower than COOL_F4, the frequency will not be limited.
After 10s of the compressor start, if the current>ICOOL, the AC will display the failure for 30 seconds and stop. The AC
will restart 3 minutes later.
Decrease the frequency to HEAT_F4 and run at HEAT_F4 for
3 minutes.
After that, the frequency will be adjusted according to the
capacity demand and rise to the upper level every 3 minutes
(When the frequency>Heat_F4 via capacity demand).
If the current frequency is lower than HEAT_F4, the frequency will not be limited.
After 10s of the compressor start, if the current>IHEAT, the AC will display the failure for 30 seconds and stop. The AC
will restart 3 minutes later.
1.2.9 Indoor / outdoor units communication protection
If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes, the AC will stop
and display the failure.
1.2.10 Oil return
Running rules:
1. If the compressor frequency keeps lower than RET_OIL_FREQ1_ADD for RET_OIL_TIME1_ADD, the
AC will rise the frequency to RET_OIL_FREQ2_ADD for RET_OIL_TIME2_ADD and then resume to
former frequency.
2. The EXV will keep 300p while the indoor units will keep the current running mode.
3. If the outdoor ambient is higher than TempT4HeatLimit_ADD during the oil return, the AC quit oil return.
1.3 Operation Modes and Functions
1.3.1 Fan mode
(1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) Indoor fan can be set to high/med/low/auto;
(4) The louver operates same as in cooling mode.
(5) Auto fan:
For Cassette、Duct
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