148
The wiring for the power line of indoor unit, the wiring between indoor and outdoor units as well as the wiring
between indoor units:
■ The electrical power line and signal lines must be fastened tightly.
■ Every indoor unit must have the ground connection.
■ The power line should be enlarged if it exceeds the permissible length.
■ Shielded lays of all the indoor and outdoor units should be connected together, with the shielded lay at the side of
signal lines of outdoor units grounded at one point.
■ It is not permissible if the whole length of signal line exceeds 1000m.
Items
Total
Current of
Indoor Units(A)
Cross
Section
(mm
2
)
Length
(m)
Rated
Current of
Overow
Breaker(A)
Rated current of residual
Circuit Breaker(A)
Ground Fault
Interruptor(mA)
Response time(S)
Cross Sectional
Area of Signal Line
Outdoor
-indoor
(mm
2
)
Indoor
-indoor
(mm
2
)
<10 2 20 20 20 A,30 mA,0.1S or below
2 cores×0.75-2.0mm
2
shielded line
≥10 and <15 3.5 25 30 30 A,30 mA,0.1S or below
≥15 and <22 5.5 30 40 40 A,30 mA,0.1S or below
≥22 and <27 10 40 50 50 A,30 mA,0.1S or below
Signal wiring of wired controller
Length of signal line (m) Wiring dimensions
≤ 250 0.75mm
2
×3 core shielded line
※
The shielding lay of the signal line must be grounded at one end.
※
The total length of the signal line shall not be more than 250m.
6.9.7 Test Run & Fault Code
■ 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.
Checkup of Installation
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.
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
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
Before Test Run
Ways of Test Run
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.
To Next Page
Loading...
