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19
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Definition of Faults and
Protection
Display of Run Indicator
Notes:
Defrost
Black for 3 seconds and
blink once
Overfull protection
Run Indicator
Black for 3 seconds and
blink 8 times
The Run Indicator
will blink under
one of following
conditions upon
start of the unit:
3. Compressor indicator (green): Bright when the compressor is started; black when the compressor is stopped.
4. Communication Run Indicator (Indoor unit panel LED1 – green)
The communication indicator will blink if the communication is normal.
7.1.4.1.2 Outdoor Unit Indicator
1. Upon energization, D120 will blink for several times and then changed to Normal Bright status.
2.D119 will blink when the communication is normal.
3. D120 will blink in case of fault on any of outdoor sensor (outdoor ambient sensor, outdoor tube sensor, air-out temperature sensor).
4.D118, D119 and D120 will blink simultaneously when the communication is abnormal.
7.1.4.1 Swing Control
You can control its ON and OFF by using the handset swing key.
7.1.4.2 Buzzer Control
When the controller receives valid key-press signal upon energization, the buzzer will give out a beep.
7.1.4.3 Automatic Control of Indoor Fan Speed
Under this mode, the indoor fan will automatically select high, medium or low speed depending on ambient temperature. Thirty-second
delay is provided for switching of fan speed.
7.1.4.4 Air Exchange
The air exchange motor will be started by remote control of Air Exchange 1 or Air Exchange 2 when the indoor fan is in normal operation.
The air exchange motor will be stopped if remote control of air exchange is cancelled or indoor fan is stopped.
7.1.5 Protection
7.1.5.1 Indoor Antifreeze Protection
If evaporator temperature is equal to or lower than -4
℃
five minutes after the compressor is started under cooling or dehumidifying
mode, the Run Indicator will blink, the compressor and outdoor fan will be stopped, the indoor fan and swing motor will maintain their
original status, and the water pump will be started. When the compressor has been stopped for 10 minutes and the evaporator
temperature is equal to or higher than 15
℃
, the indicator will be black and the controller will run under preset mode.
The key is not shielded under antifreeze protection.
7.1.5.2 Compressor High-pressure Protection
When high-pressure protection is detected, any other loads expect the water pump will be turned off, all key-press and remote control
signals will be shielded, and the Run Indicator will blink. When compressor is detected free of high-pressure protection, shield function
will be cancelled and the Run Indicator will blink. To restore the operation, it is required to press ON/OFF key to switch off the unit and
indicator before pressing ON/OFF key again.
7.1.5.3 Compressor Low-pressure Protection
1.
After the compressor is started, if it is detected for several minutes successively that the low-pressure switch is disconnected, the
complete unit will be stopped and the Run Indicator will blink. After 3 minutes, the unit will restore automatically. If low-pressure
switch protection occurs 2 times successively, the Run Indicator will blink and the unit cannot restore automatically, so as to remind
the user of air leakage. Press ON/OFF key to switch off the unit and press it again to restore operation.
2.
Low pressure switch signal will not be detected under defrost. Detection will start 10 minutes after completion of defrost.
3.
From the controller, you can press down compulsive key and auto key simultaneously to shield the detection of low pressure switch
signal for purpose of air collection. Detection will resume automatically after 6 minutes, or you can resume detection by pressing
ON/OFF key to switch off the unit and pressing it again to start the unit.
4.
If outdoor temperature is equal to or lower than 0
℃
under heating mode, detection of low pressure switch will be shielded.
5.
If the compressor is running while outdoor fan is stopped (high-temp. protection) under heating mode, detection of low pressure
switch will be shielded. Detection of low pressure switch signal will start after outdoor fan resumes operation.
6.
When the compressor is stopped, if it is detected for several minutes successively that the low-pressure switch is disconnected, the
complete unit will be stopped and the Run Indicator will blink, in which case the unit cannot restore automatically. You can press
ON/OFF key to switch off the unit and press this key again to restore operation.
7.1.5.4 Exhaust Pipe High Temp. Protection (No detection of exhaust pipe high temp. protection under defrost)
After the compressor is started, if it is detected that the exhaust temperature is too high or that the exhaust temp. sensor has fault 30
seconds successively, the Run Indicator will blink. The unit will be stopped when the indoor ambient temperature reaches the preset
value.
After the compressor has been stopped for 3 minutes, if the exhaust temperature keeps lower than 90
℃
for 3 seconds successively, the
complete unit will restore operation. If the above protection occurs 2 times successively, the complete unit cannot restore operation and
the Run Indicator will blink.
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