Heating
5＞T4
current limit
value
HeatStopI Heating stop protection
current value
6.3.7 Indoor / Outdoor Units
Communication Protection
If the indoor units do not receive the
feedback signal from the outdoor units for 2
consecutive minutes, the unit stops. The
unit displays the failure code.
6.3.8 High Condenser Coil Temp.
Protection
6.3.9 Outdoor Unit Anti-Freezing
Protection
When T2<4℃ for 250seconds or T2<0℃,
the indoor unit capacity demand is zero and
resumes normal operation when T2>8℃
and the protection time is no less than 3
minutes.
6.3.10 Oil Return
Rules for Operation
1. If the compressor frequency continues to
be lower than the frequency set for setting
time, the unit raises the frequency to the
frequency set for setting time and then
resumes with the former frequency.
2. The EXV continues at 300p while indoor
units maintain their operation.
If the outdoor ambient temperature is higher
than the set frequency during oil return, the
unit stops the oil return process.
6.3.11 Low Outdoor Ambient
Temperature Protection
When the compressor is off and T4 is lower
than -35℃ for 10 seconds, the unit stops
and displays “LP.”
When the compressor is on and T4 remains
lower than -40℃ for 10 seconds, the unit
stops and displays “LP.”
When T4 is no lower than -32℃ for 10
seconds, the unit exits protection.
6.4 Control and Functions
6.4.1 Capacity Request Calculation
Cooling Mode:
T3
Resume
Off
Decrease
Hold
To Next Page
Loading...
Need help?
General
