RZQ71~12 RZQ100~140B8W1B
Split System air conditioners
4PW23691-1A
Installation manual
14
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.
■
For a missing phase in case of W1 units, “
E7
” or “
U2
” will be
displayed on the remote controller of the indoor unit.
Operation will be impossible with either one of these
phenomena. If this happens, turn off the power, re-check the
wiring and switch the position of two of the three electrical wires.
(If operation is not possible, do not under any circumstances
force the electromagnetic contactor on.)
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
