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8.3 Main Protection
8.3.1 Three Minutes Delay at restart for compressor.
---- 1min delay for the 1
st
time start-up and 3 minutes delay for others.
8.3.2 Temperature protection of compressor top.
---- Top temp. protector cut off for 30s and restart the compressor with 3 minutes delay.
8.3.3 Temperature protection of compressor discharge.
When the compressor discharge temp. is getting higher, the running frequency will be limited as
below rules:
----Compressor discharge temp. T5>115 for 5s, compressor stops.
---- 108<T5<115, decrease the frequency to the lower level every 3 minutes.
---90<T5<105, keep running as the current frequency.
----T5<90, cancel the frequency limit control or restart compressor
8.3.4 Fan Speed is out of control.
---- When indoor fan speed is lower than 300RPM for 50 second, the whole unit stops and LED
displays failure, and the error can’t resume automatically.
8.3.5 Inverter module Protection.
----Inverter module protection itself has a protection function against current, voltage and temperature.
If these protections happened, the corresponding code will display on indoor unit LED and A/C will
stop. The unit will recover 3min delay after the protection disappeared.
8.3.6 Indoor fan delayed open function
----When the system starts up, the louver will be active immediately and the indoor fan will open 10s
later.
----If the system runs in heating mode, the anti-cold wind function has priority.
8.3.7 Compressor preheating functions.
----Preheating permitting condition:
If the main relay closed, T4＜3 and the machine is first power on, or T4＜3 and compressor has
stopped over 3 hours, the compressor heating cable will work.
----Preheating mode:
A weak current flows through the coil of compressor from the wiring terminal of compressor, then the
compressor is heated without operation.
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