33
Before Test Run
Fault Remedies
When any fault appears, refer to
“
Inquiry of fault records of indoor units
”
at the previous page, 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
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
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 1
M
"
. It can
’
t be operated if it is below 1
M
"
.
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.
check if the installation place meets the requirement
check if the water is drained to the outside
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 indoor units are positioned
Ways of Test Run
Do ask the installation personnel to make a test run. Take he 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 refrigerating/heating mode, press
“
ON/OFF
”
button for 5 seconds to enter
into the compulsive refrigerating/heating mode. Repress
“
ON/OFF
”
button to quit the compulsive
running and stop the operation of the air conditioner.
Test Run & Fault Code
Wired
Controller Fault
Code
PCB LED5(Indoor
Units)/ Receiving
Window Health Lamp
(Remote Controller)
Fault Descriptions
Fault of indoor unit pipe temp. transducer TC1
Fault of indoor unit pipe temp. transducer TC2
02
2
03
3
Fault of indoor unit dual heat source temp. transducer
04
4
Fault of indoor unit EEPROM
05
5
Fault of communication between indoor & outdoor units
06
6
Fault of communication between indoor unit and wired control
07
7
Fault of indoor unit water drainage
08
8
Fault of duplicate indoor unit address
09
9
Fault of duplicate central control address
0A
10
Corresponding faults of outdoor units
Outdoor Unit Code
20
Fault of indoor unit ambient temp. transducer TA
01
1
