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17
• Connect it to the power supply of the outdoor units to energize the heating belt of the compressor. To protect the
compressor at startup, power it on 12 hours prior to the operation.
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 & Fault Code
Before Test Run
Do ask the installation personnel to make a test run. 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.
Test Run
When any fault appears, consult the fault code of line control or the number of LED ashes 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
Fault Remedies
Check if the connections of the drainpipe and wire connection lines are correct.
The drainpipe shall be placed at the lower part while the connection line placed at the upper part. Insulating measures
should be taken such as winding the drainpipe especially on the indoor units with insulating materials.
The drain pipe should be installed as a slope to avoid protruding from the upper part and concaving at the lower part.
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