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20 31-5000500 Rev. 0
ENGLISH
TEST RUN AND FAULT CODE
Before Test Run
• Apply power to system to energize the crankcase or sump of the compressor. Power on system at least 12 hours before
operation to protect the compressor.
Check the connections at the drainpipe and wire connection lines to make sure they are correct.
• The drain outlet should be placed lower than the drain outlet of the unit. Insulate the condensate drain lines to prevent
condensation forming on the pipe. The drain line should slope away from the indoor unit.
Checkup of Installation
• Check if the main voltage is matching
• Check for any leaks at the piping joints
• Check main electrical connections for indoor and outdoor units
• Check if the serial numbers of the terminals are matched properly
• Check to make sure the structure can properly accommodate the indoor units
• Check for excessive noise
• Check insulation on refrigerant and condensate drain lines
• Check condensate drains for free flow
• Check final position of indoor units
Test Run
• The installation technician should complete a run test and evaluation. Compare the testing procedures according to the
manual and check if the temperature control works properly.
• The following procedure can be used to force the system into running mode if the system fails to start. The function is
not available 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, refer to “Inquiry of fault records of indoor units” at the previous page and consult the fault code
of line control or the number of LED flashes on the control panel. 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 float switch
09 9 Fault of duplicate indoor unit address
12 12 Fault of indoor unit 50Hz Zero-crossing
14 14 Fault of indoor unit DC motor
18 18 BS valve box or 4WV switch failure
20 20 Corresponding faults of outdoor units
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