Product Features 5
For AC fan motor units:
3.3.3 Outdoor Fan Control
• The outdoor unit will be run at different fan speed
according to T4 and compressor running frequency..
• For different outdoor units, the fan speeds are
different.
3.3.4 Condenser Temperature Protection
When the condenser temperature exceeds a configured
value, the compressor ceases operation.
3.3.5 Evaporator Temperature Protection
• Off: Compressor stops.
• Decrease: Decrease the running frequency to the lower
level per 1 minute.
• Hold: Keep the current frequency.
• Resume: No limitation for frequency.
3.4 Heating Mode(Heat Pump Units)
3.4.1 Compressor Control
1) Reach the configured temperature
• If the following conditions are satisfied, the
compressor ceases operation.
• Calculated frequency(fb) is less than minimum limit
frequency(FminH).
• Compressor runs at FminH more than 10 minutes.
• T1 is higher than or equal to Tsc+ HDIFTEMP2.
Note: HDIFTEMP2 is EEPROM setting parameter. It is 2°C
usually.
• If one of the following conditions is satisfied, not
judge protective time.
• Compressor running frequency(fr) is more than test
frequency(TestFre).
• When compressor running frequency is equal to
test frequency, T4 is more than 15°C or T4 fault.
• Change setting temperature.
• Turbo or sleep function on/off.
2) When the current is higher than the predefined safe
value, surge protection is activated, causing the
compressor to cease operations.
3.4.2 Indoor Fan Control:
1) In heating mode, the indoor fan operates continuously.
The fan speed can be set to 1%-100%, or mute.And
the anti-cold wind function has the priority.
• Anti-cold air function
• The indoor fan is controlled by the indoor
temperature T1 and indoor unit coil temperature
T2.
T1 ≥ 19°C(66.2°F) ΔTE1=0
15°C(59°F) ≤ T1 < 19°C(66.2°F)
ΔTE1=19°C-T1
(34.2°F-T1)
T1<15°C(59°F) ΔTE1=4°C(7.2°F)
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