Electronic Function; Abbreviation; Electric Control Working Environment; Main Protection - Pioneer YN018GMFI16M2D Service Manual

6. Electronic Function

7.1 Abbreviation

T1: Indoor ambient temperature
T2: Coil temperature of indoor heat exchanger's
mid point.
T2B: Coil temperature of indoor heat exchanger's
outlet.
T3: Pipe temperature of outdoor heat exchanger
T4: Outdoor ambient temperature
Tp: Compressor discharge temperature

7.2 Electric control working environment.

7.2.1 Input voltage: 230V.
7.2.2 Input power frequency: 60Hz.
7.2.3 Indoor fan normal working amp. is less than
1A.
7.2.4 Outdoor fan. Normal working amp. is less
than 1.5A.
7.2.5 Four-way valve normal working amp. is less
than 1A.

7.3 Main Protection

7.3.1 Three Minute Time Delay at restart of the
compressor.
---- 1min delay for the 1
minutes delay for subsequent starts.
7.3.2 Temperature protection of compressor
discharge.
When the compressor discharge temp. rises, the
running frequency will be limited per the below
rules:
----If 102℃<Tp<115℃, decrease the frequency to
the lower level every 2 minutes till reaching F1.
---If Tp>115℃ for 10 seconds, the compressor
will stop and restart when Tp<90℃.
7.3.3 Fan Speed is out of control (DC fan
motor).
---- When outdoor fan motor speed is lower than
300RPM or higher than 2400RPM for 60
seconds, the whole unit stops and LED displays
failure.
st
time start-up and 3
7.3.4 Inverter module Protection.
----Inverter module protection has protection
functions against current, voltage and
temperature. If these protections are triggered,
the corresponding code will display on indoor unit
LED and A/C will stop. The unit will recover 3min
after the protection conditions disappear.
7.3.5 Low voltage protection
VOLTAGE
VOLT_RST1_ADD
VOLT_LTM1_ADD
VOLT_RST2_ADD
VOLT_LTM2_ADD
Note: if the low voltage protection is triggered and
not corrected within 3min, it will keep the
protection even after restarting the machine.
7.3.6 Compressor current limit protection
If the compressor current exceeds the current
limit value for 10 seconds, the compressor
frequency will be limited as per the below table.
Cooling mode:
Current Current limit
frequency(Hz) value(A)
COOL_F16 ICOOLLMT12
COOL_F15 ICOOLLMT11
COOL_F14 ICOOLLMT10
COOL_F13 ICOOLLMT9
COOL_F12 ICOOLLMT8
COOL_F11 ICOOLLMT7
COOL_F10 ICOOLLMT6
COOL_F9 ICOOLLMT5
COOL_F8 ICOOLLMT4
COOL_F7 ICOOLLMT3
COOL_F6 ICOOLLMT2
COOL_F5 ICOOLLMT1
If the current frequency is lower than COOL_F4, the frequency will
not be limited.
After 10s of the compressor start, if the current>ICOOL, the AC will
display the failure for 30 seconds and stop. The AC will restart 3
minutes later.
No limit
VOLT_LTM_FREQ1_ADD
VOLT_LTM_FREQ2_ADD
Frequency limit
Decrease the frequency to
COOL_F4 and run at COOL_F4
for 3 minutes.
After that, the frequency will be
adjusted according to the capacity
demand and rise to the upper
level every 3 minutes
(When the frequency>COOL_F4
via capacity demand).