Daikin REQ71B8V3B Installation Manual Download

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REQ71+10 REQ7 REQ71~12 REQ71B2W1B
Split System air conditioners
4PW23690-1C

Installation manual

Point for attention regarding quality of the public electric power
supply

This equipment complies with EN/IEC 61000-3-11

(1)

provided that

the system impedance Z

sys

is less than or equal to Z

max

at the

interface point between the user's supply and the public system. It is
the responsibility of the installer or user of the equipment to ensure,
by consultation with the distribution network operator if necessary,
that the equipment is connected only to a supply with a system
impedance Z

sys

less than or equal to Z

max

EST

OPERATION

■

Be sure to fully open the liquid-side and gas-side stop valves.

■

For details on test operation, refer to the indoor unit installation
manual.

Pre-run checks

Test run

Make sure the liquid and gas shut-off valves are open.

Be sure to close the frontside panel before operation, as not
doing so can cause electric shock.
-

The refrigerant pressure may not rise, even if the shut-off
valve is opened after an air purge is performed using a
vacuum pump.
This is because the indoor unit refrigerant piping is closed off
with electric valves inside. This will not create any problems
during operation.

Be sure to set it to cooling and press the operation switch.

Press the inspection/test-run switch on the remote control to put
the machine into test-run mode.

Make sure the compressor is not starting and stopping during
the test-run by listening. If it is starting and stopping,
immediately stop the machine using the remote controller, and
check the refrigerant level, etc. There may be some sort of
malfunction.

At first test-run of the unit, the valves are checked if they are not
closed. Therefore the unit starts in cooling mode (even if the
remote controller is set to heating mode) for about 2-3 minutes
and then switches automatically to heating mode. The remote
controller will always display heating mode.

Precautions regarding test-runs

■

If the remote control shows E0, E3 or E4 as an error code, there
is a possibility that either the shut-off valve is closed, or the
outlet vent is closed.

■

For a reverse phase in case of W1 units, U1 will be displayed on
the remote controller of the indoor unit.
For a missing phase in case of W1 units, E0 or E6 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.)

■

If the error code E6 is displayed on the remote contoller, check
for voltage imbalance.

■

If the error code U4 or UF is displayed on the remote contoller,
check the inter-unit branch wiring connection.

Diagnosis

■

On the remote controller LCD
If the machine stops due to some malfunction, you can diagnose
the problem using the error code displayed on the remote
controller.

The malfunction code should be looked up in the installation
manual for the indoor unit.

Depending on the indoor unit or outdoor unit type, error
codes may not be displayed.

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.

(1) European/International Technical Standard setting the limits for voltage

changes, voltage fluctuations and flicker in public low-voltage supply
systems for equipment with rated current

≤

75 A.

max

(

Ω

)

REQ71B8V3B

0.07

Equipment complying with

EN/IEC 61000-3-12