Vivax ACP-09CH25AEI, Service Manual, Page: 35 / 54

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8.3 Main Protection
8.3.1 Time delay at restart for compressor.
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 a
℃
t the current frequency.
8.3.4 Fan Speed is out of control.
----When Indoor Fan Speed keeps too low or too high for certain time, the unit will stop and the LED
will display the failure
8.3.5 Inverter module Protection.
----The Inverter module itself has a protection function against current, voltage and temperature. If
these protections happen, the corresponding code will display on indoor unit.
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 indoor fan will be also controlled by anti-cold wind funtion.
8.3.7 Compressor preheating functions.\
----Preheating permitting condition:
If T4(outdoor ambient temperature)
＜
3 and the machine connects to power supply newly or if T4
℃ ＜
3 and compressor has stop
℃
ped for over 3 hours, the compressor heating cable will work.
----Preheating mode:
A weak current flow through the coil of compressor from the wiring terminal of compressor, then the
compressor is heated without operation.
----Preheating release condition:
If T4
＞
5 or
℃
the compressor starts running, preheating function will stop.
8.3.8 Zero crossing detection error protetion
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