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31-5000473 Rev. 0 21
ENGLISH
TEST RUN AND FAULT CODE
Before Test Run
• Connect unit to the power supply of the outdoor units to energize the heater of the compressor. Power the system on
for 12 hours prior to start up to protect the compressor.
Check if the connections of the drainpipe and wire connection lines are correct.
Run the drain line below the outlet of the unit. Insulate the condensate drain piping to prevent condensation. Install drain
piping with proper slope away from the indoor units.
Checkup of Installation
• Check if the main voltage is correct
• Check for any leaks at the piping joints
• Check if the connection of the main power for the indoor & outdoor units are correct
• Check if the serial numbers of the terminals are matched properly
• Check if the installation place meets the requirement
• Check if there is too much noise
• Check if the connecting line is fastened
• Check if the refrigerant and condensation lines are insulated
• Check if the water is drained to the outside
• Check if the indoor units are positioned
Test Run
Equipment installers should test-run all equipment. Test procedures are listed in the installation manual. Take the testing
procedures according to the manual and check if the temperature regulator works properly. When the machine fails to
start due to the room temperature, the following procedures can be taken to do the compulsive running. The function is
not provided for the type with remote control.
• Set the YR-E17 wired controller to cooling/heating mode, press "ON/OFF" button for 10 seconds to enter into the
compulsive cooling/heating mode. Press "ON/OFF" button again to quit the compulsive running and stop the operation
of the system.
Fault Remedies
When any fault appears, consult the fault code of line control or the number of LED flashes on the control panel of the
indoor units/health lamp of receiving window of remote control. Refer to the below table lookup fault descriptions.
Indoor Unit Faults
Failure Code at Wired
Controller PCB LED5 (indoor Units) /
Receiver Timer Lamp (Remote
Controller)
Fault Descriptions
01 1 Fault of indoor unit ambient temp. sensor TA
02 2 Fault of indoor unit pipe temp. sensor TC1
03 3 Fault of indoor unit pipe temp. sensor TC2
04 4 Fault of indoor unit dual heat source temp. sensor
05 5 Fault of indoor unit EEPROM
06 6 Fault of communication between indoor & outdoor units
07 7 Fault of communication between indoor unit and wired control
08 8 Fault of indoor unit water drainage
09 9 Fault of duplicate indoor unit address
0A 10 Reserve
0C 12 Fault of zero crossing
0E 14 Fault of DC fan
Outdoor Unit Code 20 Corresponding faults of outdoor units
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