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6. Electronic Function
6.1 Abbreviation
T1: Indoor ambient temperature
T2: Coil temperature of indoor heat exchanger at
middle circuit.
T2B: Coil temperature of indoor heat exchanger at
outlet. (This sensor is located in the outdoor unit)
T3: Pipe temperature of outdoor heat exchanger
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
6.2 Electric control working environment.
6.2.1 Input voltage: 230V.
6.2.2 Input power frequency: 60Hz.
6.2.3 Indoor fan normal working amp. is less than
1A.
6.2.4 Outdoor fan. Normal working amp. is less than
1.5A.
6.2.5 Four-way valve normal working amp. is less
than 1A.
6.3 Main Protection
6.3.1 Three Minute Delay at restart of the
compressor.
---- 1 min delay for the 1
st
time start-up and 3 minute
delay for all subsequent starts.
6.3.2 Temperature protection of compressor
discharge.
As the compressor discharge temperature rises, the
running frequency will be limited as per the following
rules:
----If 105 (221 ) ≦ T5 <110 (230 ), keep the
current frequency.
----If the temperature increases and T5≧110 (230
), decrease the frequency to the next lower level
every 2 minutes till reaching F1.
---If T5≧115 (239 ) for 10 seconds, the
compressor will stop and restart when T5<90 (194
).
6.3.3 Fan Speed is out of control.
---- When outdoor fan speed is lower than 100RPM
or higher than 2400RPM for 60 seconds, the system
stops and LED displays
E8 failure.
6.3.4 Inverter module Protection.
----Inverter module protection safeguards the
system against current, voltage and temperature
abnormalities. If these protections are triggered, the
corresponding code will display on indoor unit LED
and system will stop. The unit will recover after the
cause of the error disappears, and following a
minimum 3 minute time delay.
6.3.5 Low voltage protection
VOLTAGE
No limit
VOLT_LTM_FREQ1_ADD
VOLT_LTM_FREQ2_ADD
Note: if the low voltage protection is triggered and
not restored within 3minutes, the system will keep
the protection active after the restart.
6.3.6 Compressor current limit protection
Temperature interval.of current limit is same as the
range of the T4 limited frequency.
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