Test Run & Failure Code
Before Test Run
• Before switching it on, test the supply terminal tier (L, N terminals) and grounding points with
500V megaohm meter and check if the resistance is above 1MΩ. It can't be operated if it is
below 1MΩ.
• Connect it to the power supply of 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.
Check if the arrangements of the drainpipe and connection line are correct.
The drainpipe shall be placed at the lower part while the connection line placed at the upper
part. Heat preservation measures should be taken such as winding the drainpipe esp. in the
indoor units with heating insulating materials.
The drain pipe should be made a slope type to avoid protruding at the upper part and concaving
at the lower part on the way.
Checkup of Installation
check if the mains voltage is matching
check if there is air leakage at the piping joints
check if the connections of mains power and
indoor & outdoor units are correct
check if the serial numbers of terminals are
matching
Ways of 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 wired controller to cooling/heating mode, press "ON/OFF" button for 5 seconds
to enter into the compulsive cooling/heating mode. Repress "ON/OFF" button to quit the
compulsive running and stop the operation of the air conditioner.
Fault Remedies
When any fault appears, consult the fault code of line control or the flashing times for LED5 of
computer panel of indoor units/health lamp of receiving window of remote control and find out
the faults as shown in the following table to remove all faults.
Indoor Unit Faults
Failure code at
wired controller
Lamp(Remote Controller)
01
02
03
04
05
06
07
08
09
0A
Outdoor Unit Code
PCB LED5(Indoor
Units)/ Receiver Timer
1
2
3
4
5
6
7
8
9
10
20
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 connectors for tubing are heat
insulated
check if the water is drained to the outside
check if the indoor units are positioned
Fault Descriptions
Fault of indoor unit ambient temp. transducer TA
Fault of indoor unit pipe temp. transducer TC1
Fault of indoor unit pipe temp. transducer TC2
Fault of indoor unit dual heat source temp. transducer
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 water drainage
Fault of duplicate indoor unit address
Fault of duplicate central control address
Corresponding faults of outdoor units
18