Installation manual
13
RZQS71~125B7V3
Split System air conditioners
4PW32097-1
6
A complete test run surely includes shutting off power after
having performed a normal operation stop on the remote
controller. Do not stop operation by turning circuit breakers off.
Failure diagnosis at the moment of first installation
In case nothing is displayed on the remote controller (the current set
temperature does not display), check for any of the following
abnormalities before you can diagnose possible malfunction codes.
■
Disconnection or wiring error (between power supply and
outdoor unit, between outdoor unit and indoor units, between
indoor unit and remote controller).
■
The fuse on the outdoor unit PCB may have run out.
■
If the remote controller shows “
L8
” as an error code, there is a
possibility that either the shut-off valve is closed, or the outlet
vent is closed.
■
If the error code “
U2
” is displayed on the remote controller, check
for voltage imbalance.
■
If the error code “
U4
” or “
UF
” is displayed on the remote
controller, check the inter-unit branch wiring connection.
■
The reversed phase protection detector of this product only
works during the initialisation stage after a power reset.
The reversed phase protection detector is designed to stop the
product in case of an abnormality when the product is started
up.
■
When the reversed phase protection circuit forced the unit to
stop, check if all phases are existing. If this is the case, shut
off the power supply to the unit and replace two of three
phases. Turn on power again and start the unit.
■
Reversed phase detection is not performed while the product
is operating.
■
In case of possible reversal of phases after a momentary
black out of power and the power goes on and off while the
product is operating, install a reversed phase protection
circuit on site. Such situation is not unimaginable when using
generators. Running the product in reversed phase can
break the compressor and other parts.
D
ISPOSAL
REQUIREMENTS
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
N
OTES
