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TEST RUN AND FAULT CODE
Before Test Run
• Connect it to the power supply of the outdoor units to energize the sump heater in the compressor. Power it on 12
hours prior to startup and operation.
Check the connections at the drainpipe and wire connection lines to make sure they are correct.
• The drainpipe shall be placed at the lower part while the connection lines are placed at the upper part. Insulating should
be applied to drainpipes especially on the indoor units to avoid condensation issues.
• The drain pipe should be installed so it slopes away from the unit.
Checkup of Installation
• Check the main power connections for proper voltage balance.
• Check for any leaks at the piping joints.
• Check the power connections at the main power for the indoor & outdoor units.
• Check if the unit locations conform to installation guidelines.
• Check for excessive noise.
• Check if connection of the wiring is fastened.
• Check if the refrigerant and condensation lines are insulated.
• Check if the condensate drains are terminated properly.
• Check if the indoor units are positioned properly.
Test Run
• Ask the installation technician to perform a run test. Make sure the testing procedures is according to the manual and
check if the temperature controls work properly.
• The following procedure can be used to force compulsive running mode if the machine fails to start due to room
temperature. The function is not available for model types 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
Consult the fault code at wired controls or the number of LED flashes on the control panel of the indoor units/health lamp.
Refer to the below table for fault descriptions.
Indoor Unit Faults
Failure Code at Wired
Controller
01
02
03
05
06
07
08
09
12
14
18
20
31-5000553 Rev. 1
PCB LED5 (indoor Units) /
Receiver Timer Lamp (Remote
Controller)
1
2
3
5
6
7
8
9
12
14
18
20
Fault Descriptions
Fault of indoor unit ambient temp. sensor TA
Fault of indoor unit pipe temp. sensor TC1
Fault of indoor unit pipe temp. sensor TC2
Fault of indoor unit EEPROM
Fault of communication between indoor & outdoor units
Fault of communication between indoor unit and wired control
Fault of indoor unit float switch
Fault of duplicate indoor unit address
Fault of indoor unit 50Hz Zero-crossing
Fault of indoor unit DC motor
BS valve box or 4WV switch failure
Corresponding faults of outdoor units
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