18
In this mode, four-way valve electrify.
Note:
In each mode, after protection and unit stop, modes switch or unit off, 4-way valve will power off after 2 minutes delay.
7.2.3.5 Defrosting under Heat mode
Under Heat mode, there is intelligent defrosting.
7.2.3.6 Heating Turbo function
When outdoor unit received heating mode Turbo function from the indoor unit, at this time, outdoor unit add certain
frequency running.
7.2.4 Fan mode
When outdoor unit main mode transfer from Cool (Dehumidify) or Heat mode to Fan mode, compressor stop running,
outdoor fan will stop running after 1min delay.
7.2.5 Electric heat control target
7.2.5.1 Compressor electric heat belt control
After powered on, if T
out_amb.
≤
-5°C and compressor hasn’t start up, electric heat belt will start to work.
After compressor started up or T
out_amb.
> -3°C, the electric heat belt will stop to work;
If -5°C < T
out_amb
, compressor electric heat belt will keep original status.
7.2.5.2 Chassis electric heating cord control (optional)
From entering into Defrosting to Defrosting finish, within compressor started up 3 minutes, if ambient temp. is very low,
chassis electric heating belt work; if ambient temperature is very high, it will not work.
7.2.6 System protection function
7.2.6.1 Indoor unit modes confliction protection
If indoor unit presetting is different, will accord to the following condition for running: will accord to the first entering indoor
unit mode for the fiducial mode, to compare with other indoor unit modes to judge whether confliction happen or not.
1) Cool (Dehumidify) conflict with Heat mode: some indoor unit received the outdoor unit mode confliction signal later, this
indoor unit will turn off, memorize unit off status.
2) Fan and Heat confliction: some indoor unit received outdoor unit mode confliction signal later, this indoor unit will turn
off, memorize unit off status.
7.2.6.2 Air exhaust temperature protection
If continuously 6 times, air exhaust temperature protection happened, the compressor cannot resume to run. If need to
power off and re-power on can resume. (if compressor running time exceed 7mins, the protection time will clear 0.)
7.2.6.3 Communication malfunction
If continuously 3mins hasn’t received the correct signal of indoor unit and within 10s, cannot receive the correct signal
from the drive board that is the communication malfunction, outdoor unit will stop running, auto heating or heating mode,
blow surplus heat, in other modes, indoor unit will run at presetting fan speed.
7.2.6.4 Power module protection and module overheat protection
Mode protection acts, compressor stop running, after compressor stopped 3mins, will automatically resume to running
status, if protection times continuously happened 6 times (if compressor running time exceed 7mins, the protection times
will clear 0), unit turned off and sent wrong signal to indoor unit, cannot resume running status; It is need to re-power on
can resume to run.
7.2.6.5 Compressor overcurrent protection
If detected the whole unit current value exceeded the determinative value, compressor stopped 3mins later, it will
automatically resume to running status, protection times exceeds 6 times (if compressor running time is more than 7min,
that the protection times will clear to 0), unit will turn of sent wrong signal to indoor unit, cannot automatically resume to
run. At this time, it is need to power off and re-power on can resume.
7.2.6.6 Sensor malfunction detection
Outdoor
: at unit standby, do not test outdoor each sensor malfunction, unit turned on and compressor continuously run
for 3mins later, start to detect air exhaust sensor malfunction; Defrosting (or heating oil return) finished, within 10mins, do
