Electronic Display Functions; Abbreviations; Display Functions; Main Protection - Heat Controller B-DVH09SD-0 Service Manual

DVC/DVH Inverter Mini-Split

8. Electronic Display Functions

8.1 Abbreviations

T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
Ts: Temperature Set Point

8.2 Display functions

8.2.1 Icon Identification on indoor display board.
This indicator illuminates when the
air conditioner starts defrosting
Defrost
automatically or when the warm air
control feature is activated in
heating mode
Run Flashes when the unit is in standby.
Illuminates a solid light when the
unit is on
This indicator illuminates when
Timer
TIMER is set ON/OFF.
Temperature indicator
Displays the temperature settings
when the unit is operational, also
displays any error codes for
diagnosis and troubleshooting.
Receives the signal from the remote
Signal
control.
Receiver
.

8.3 Main Protection

8.3.1 Compressor Three Minute Time Delay
There is a 1 minute delay the 1
started-up, then a 3 minute delay each time the
unit is started up after the 1
8.3.2 Compressor Top Temperature
Protection
The unit will stop working when the top of the
compressor temperature is reached, and will
restart after the compressor top temperature
protector restarts.
8.3.3 Compressor Discharge Temperature
Protection
When the compressor discharge temperature is
getting high, the frequency of the compressor
will be limited as stated below:
When the compressor discharge temperature
T5>239°F(115°C) for 5s, the compressor will
stop. However, when the temperature is
between 226.4°F (108°C)<T5<239°F (115°C),
the compressor frequency will decrease to the
lowest level every 3 minutes. Then when the
temperature is 194°F (90°C) <T5<221°F
(105°C), the compressor will keep running at
the current frequency. When T5<194°F
(90°C), there will be no limit on the compressor
frequency.
8.3.4 Out of Control Fan Speed
When Indoor Fan Speed runs at 300RPM or
lower, for a designated period of time, the unit
will stop running and the appropriate error code
will show on the display.
8.3.5 Inverter Module Protection
The Inverter module has protection features
regarding current, voltage and temperature. If
these any of these are abnormal, the
corresponding error code will display on indoor
unit and the unit will stop working.
8.3.6 Indoor fan delayed open function
When the unit starts up, the louver will be active
immediately, but the indoor fan will not start for
10s. If the unit is in heating mode, the indoor
fan will be also controlled by anti-cold wind
function to eliminate cold blow.
18
Heat Controller
st
time the unit is
st
time.