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REQ71+10 REQ71~125B7W1B
Split System air conditioners
4PW19495-1B

Installation manual

10

Specifications of standard wiring components

T

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

1

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.

2

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

3

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

4

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.

5

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.

D

ISPOSAL

 

REQUIREMENTS

Dismantling of the unit, treatment of the refrigerant, oil and any other
parts should be done in accordance with the relevant local and
national regulations.

Power supply

Model

Field 

fuse 

Wire type

(1)

(1) Only in protected pipes, use H07RN-F when protected pipes are not used.

Size

Wire type 

of wiring 

between the 

units

REQ71B7V3B

32 A

H05VV-U3G

Wiring size 

must comply 

with the 

applicable 

local and 

national code

H05VV-U4G2.5

REQ100B7V3B

40 A

REQ71B7W1B

16 A

H05VV-U5G

REQ100B7W1B

REQ125B7W1B

20 A

Items to check

Electrical wiring
Inter-unit wiring
Ground wire

Is the wiring as mentioned on the wiring
diagram?
Make sure no wiring has been forgotten and that
there are no missing phases or reverse phases.

Is the unit properly grounded?

Are any of the wiring attachment screws loose?

Refrigerant piping

Is the size of the piping appropriate?

Is the insulation material for the piping attached
securely?
Are both the liquid and gas pipes insulated?

Are the shut-off valves for both the liquid side and
the gas side open?

Extra refrigerant

Did you write down the extra refrigerant and the
refrigerant piping length?

 Opening direction

A

Liquid side

B

Gas side

Remove the cap and turn 
counterclockwise with a 
hex wrench until it stops

A

B

Error code

Description

E6

Compressor current overload

J2

Electric current sensor malfunction

Содержание REQ-BW1

Страница 1: ...INSTALLATION MANUAL REQ71B7V3B REQ100B7V3B REQ71B7W1B REQ100B7W1B REQ125B7W1B Split System air conditioners...

Страница 2: ...4 5 6 6 3 1 2 3 4 5 A B A E B C D H H1 L1 A A B2 B2 B2 C C D1 D1 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 A A B1 B1 B1 B1 B1 B1 B2 B2 B2 C C D1 D1 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 1 1 2...

Страница 3: ...ia ca acestea s fie utilizate n conformitate cu instruc iunile noastre 19 skladni z naslednjimi standardi in drugimi normativi pod pogojem da se uporabljajo v skladu z na imi navodili 20 on vastavuses...

Страница 4: ...ount exceeds the limit it may cause an oxygen deficiency accident Be sure to use only the specified accessories and parts for installation work Failure to use the specified parts may result in water l...

Страница 5: ...Gas pipe Ignition or explosion may occur if the gas leaks Water pipe Hard vinyl tubes are not effective grounds Lightning conductor or telephone ground wire Electric potential may rise abnormally if...

Страница 6: ...foundation of concrete blocks etc the height of the foundation should be maximum 150 mm 5 If you install the unit on a frame please install a waterproof plate within 150 mm of the underside of the un...

Страница 7: ...elevant local and national regulations The minimal pipe thickness for R 410A piping must be in accordance with the table below O Annealed 1 2H Half hard Suction side obstacle Obstacle is present Disch...

Страница 8: ...and new piping should be installed If the previously used model had problems with its compressor this might cause oxidized coolant oil scale residue and other adverse effects If the indoor or outdoor...

Страница 9: ...r turns It is now closed Cautions for handling the valve cover The valve cover is sealed where indicated by the arrow Take care not to damage it After operating the valve be sure to tighten the valve...

Страница 10: ...e refrigerating system and preventing normal operation When brazing while inserting nitrogen into the piping nitrogen must be set to 0 02 MPa with a pressure reducing valve just enough so that it can...

Страница 11: ...the vacuum pump for 1 hour to 100 7 kPa vacuum drying If the system cannot be evacuated to 100 7 kPa within 2 hours repeat the operation of vacuum break and vacuum drying Then after leaving the system...

Страница 12: ...tside 1 Wire 2 Bush 3 Nut 4 Frame 5 Hose When you do not use a wire conduit be sure to protect the wires with vinyl tubes to prevent the edge of the knock out hole from cutting the wires Follow the el...

Страница 13: ...se 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 e...

Страница 14: ...hermo switch M1F M2F Q1RP Phase reverse circuit R1T Thermistor air R2T Thermistor coil R3T Thermistor discharge RC Signal receiver circuit S1PH Pressure switch HIGH S1PL Pressure switch LOW SD Safety...

Страница 15: ...NOTES NOTES...

Страница 16: ...Zandvoordestraat 300 B 8400 Oostende Belgium 4PWEN19495 1B...

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