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Test Run & Fault 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 during start up, 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 is 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 protrusion at the upper part and concaving
at the lower part on the way.
Check-up 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 measures can be
taken for forceful running. This function is not provided for the type with remote control.
• Set the 40VCW217FQEE wired controller to refrigerating/heating mode, press "ON/OFF" button
for 10 seconds to enter into the compulsive refrigerating/heating mode. Repress "ON/OFF" button
to quit forced 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 the
computer panel of indoor units/health lamp of receiving window in the remote control and identify
the issue as shown in the following table to repair them.
Indoor Unit Faults
PCB LED5(lndoor Units)/
Failure code at
Receiver Timer Lamp
wired controller
(Remote Controller)
01
02
03
04
05
06
07
08
09
12
14
15
18
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
1
Fault of indoor unit ambient temp. transducer TA (Tas)
2
Fault of indoor unit pipe temp. transducer TC1
3
Fault of indoor unit pipe temp. transducer TC2
4
Fault of indoor unit pipe temp. transducer TC22
5
Fault of indoor unit EEPROM
6
Fault of communication between indoor & outdoor units
Fault of communication between indoor unit and wired
7
control
8
Fault of indoor unit float switch
9
Fault of duplicate indoor unit address
12
Fault of indoor unit 50Hz Zero-crossing
14
Fault of indoor unit DC motor
15
The outdoor fresh air supply temperature sensor is at fault
18
BS valve box or 4WV switch failure
20
Corresponding faults of outdoor units
22
Fault Descriptions
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