Main Protection - Heat Controller VMH C Series Service Manual

Service Manual
This indicator appears only when the compressor is in operation and indicates the current operating
frequency.
8.2.2 LED display control function.
Pressing "LED display" button on remote controller will turn off all displays on indoor unit.
Pressing once again, all displays resume.

8.3 Main Protection

8.3.1 Three Minute Delay at restart for compressor.
---- 1 minute delay for the 1st time start-up and 3 minute delay for others.
8.3.2 Temperature protection of compressor top.
---- Top temp. protector will cut off for 30 seconds and restart the compressor after 3 minute delay.
8.3.3 Temperature protection of compressor discharge.
----When the compressor discharge temp. raises, the running frequency will be limited as
follow:
----When compressor discharge temp. T5>239°F(115°C) for 5 seconds, compressor stops.
---- 226°F (108°C)<T5<239°F(115°C), decrease the frequency every 3 minutes.
----- 194°F (90°C)<T5<221°F(105°C), keep running at the current frequency.
-----T5 <194°F(90°C) no limit for frequency.
8.3.4 Fan Speed is out of control.
----When Indoor Fan Speed is too low or too high for a certain time, the unit will stop and the LED will
display this code on indoor.
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 louver will open
10 seconds later.
8.3.7 Compressor preheating functions.
----Preheating permitting condition:
VMH 30, 36 SerieS
20
Heat Controller