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RR+RQ71+10 RR+RQ7 RR+RQ71~12 
RR+RQ71B2W1B
Split System air conditioners
4PW23689-1C

Installation manual

10

Precaution for pumping-down operation

The outdoor unit is equipped with a low-pressure switch to protect the
compressor. 

Take the following steps to perform the pumping-down operation.

This is the end of pumping-down operation. After pumping-down
operation, the remote controller can show the following:

-

"U4"

-

blank screen

-

indoor fan operates for about 30 seconds

Even when the ON button on the remote controller is pressed, it will
not operate. Turn off the main power supply switch and turn it on
again in need of operation.

E

LECTRICAL

 

WIRING

 

WORK

Precautions on electrical wiring work

Before obtaining access to terminal devices, all supply circuits
must be interrupted. 

Use only copper wires.

The wiring between the indoor unit and outdoor unit must be for
230 V.

Do not turn on the main switch until all the wiring is completed.
Make sure that the main switch has a contact separation of at
least 3 mm in all poles.

For W1
Make sure to connect power supply cables in normal phase. If
connected in reverse phase, the remote controller of the indoor
unit indicates "U1" and the equipment cannot operate. Change
any two of the three power supply cables (L1, L2, L3) to correct
phase.
If the contact in the magnetic switch should be forcibly turned on
while the equipment is inoperative, the compressor will burn out.
Never try to forcibly turn on the contact.

Never squeeze bundled cables into a unit.

Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).

Secure the electrical wiring with clamping material as shown in
the figure below so that it does not come in contact with the
piping, particulary on the high-pressure side.
Make sure no external pressure is applied to the terminal
connectors.

Secure the wiring in the order shown below.

1

Secure the ground wire to the shut-off valve attachment plate so
that it does not slide.

2

Secure the ground wire to the shut-off valve attachment plate
one more time along with the electric wiring and the inter-unit
wiring.

Lay the electrical wiring so that the front cover does not rise up
when doing wiring work and attach the front cover securely.

NOTE

Never short-circuit the low pressure switch in this
operation.

Procedure

Precaution

1

Put a pressure gauge at the 
service port of the gas stop 
valve.

Use a pressure gauge 
reserved for R410A 
exclusively.

2

Start the fan operation with the 
remote controller.

Confirm that stop valves both 
on the liquid and gas side are 
open.

3

Push the pumping-down 
button on the PC board of the 
outdoor unit.

Compressor and outdoor fan 
will start operation 
automatically.
If step 3 is performed before 
step 2, then the indoor fan 
may automatically start 
running. Please pay attention 
to this.

4

Continue operation for 
2 minutes until operation 
condition stabilizes.

5

Close the stop valve on the 
liquid side securely. (See 

"How 

to use the shut-off valve" on 
page 6

)

Insecure closing of the valve 
may result in burning of the 
compressor.

6

When the low-pressure switch 
is activated, the unit stops 
working. At this time, close the 
stop valve on the gas side.

All wiring must be performed by an authorized
electrician.

All components procured on the site and all electric
construction should comply with the applicable local
and national codes.

High voltage
To avoid electrical shock, make sure to disconnect the
power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute, always measure
the voltage at the terminals of main circuit capacitors
or electrical parts and, before touching, make sure
that those voltages are 50 V DC or less.

NOTE

To persons in charge of electrical wiring work:

Do not operate the unit until the refrigerant piping is
complete. (Running it before the piping is ready will break
the compressor.)

1

Switch box

2

Stop valve mounting plate

3

Ground

4

Power supply and ground wiring

5

Wiring between units

6

Tie-wrap 

1

5

4

6

2

3

V3-type

W1-type

Summary of Contents for RR71B8V3B

Page 1: ...INSTALLATION MANUAL RR71B8V3B RR71B2V3B RR100B8V3B RR71B8W1B RR71B2W1B RR100B8W1B RR125B8W1B RQ71B8V3B RQ71B2V3B RQ100B8V3B RQ71B8W1B RQ71B2W1B RQ100B8W1B RQ125B8W1B Split System air conditioners...

Page 2: ...1 2 4 5 2 4 5 9 7 6 6 8 3 3 1 3 2 4 5 A B A E B C D H H1 L1 H1 H2 L3 L1 L2 H1 H2 L4 L1 L3 L2 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...

Page 3: ...ttaen m r yksi 14 za dodr en ustanoven p edpisu 15 prema odredbama 16 k veti a z 17 zgodnie z postanowieniami Dyrektyw 18 n urma prevederilor 19 ob upo tevanju dolo b 20 vastavalt n uetele 21 22 laika...

Page 4: ...the power supply circuit or improper electrical construction may lead to electric shocks or fire Make sure that all wiring is secure using the specified wires and ensuring that external forces do not...

Page 5: ...contains high levels of salt such as that near the ocean Where voltage fluctuates a lot such as that in factories In vehicles or vessels Where acidic or alkaline vapour is present BEFORE INSTALLATION...

Page 6: ...e please install a waterproof plate within 150 mm of the underside of the unit in order to prevent the invasion of water from the lower direction 6 When installing the unit in a place frequently expos...

Page 7: ...ld comply with relevant local and national regulations The minimal pipe thickness for R410A piping must be in accordance with the table below O Annealed 1 2H Half hard Suction side obstacle Obstacle i...

Page 8: ...piping kit Install the branch pipes horizontally with a maximum inclination of 15 or vertically Length of branch pipe to the indoor unit should be as short as possible Try to keep lengths of both bra...

Page 9: ...e deformed if only a torque wrench is used when loosening or tightening flare nuts always lock the shut off valve with a wrench and then use a torque wrench Do not place wrenches on the valve cover Do...

Page 10: ...t coat the flare inner surface with ether oil or ester oil and initially tighten 3 or 4 turns by hand before tightening firmly After completing the installation carry out a gas leak inspection of the...

Page 11: ...rs and bring the system to 100 7 kPa After keeping the system under that condition for more than one hour check if the vacuum gauge rises or not If it rises the system may either contain moisture insi...

Page 12: ...mount R R1 R2 1 00 0 30 1 30 kg Example 2 1 G1 L1 5 m G2 L2 L3 L4 17 17 20 54 2 Over 30 m a G1 5 m R1 0 0 kg b G1 G2 30 5 54 30 29 6 4 R2 0 90 kg 3 Refrigerant charge amount R R1 R2 0 0 0 9 0 9 kg Tot...

Page 13: ...ground wire to the shut off valve attachment plate so that it does not slide 2 Secure the ground wire to the shut off valve attachment plate one more time along with the electric wiring and the inter...

Page 14: ...d wiring components 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 Zsys is less than or e...

Page 15: ...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...

Page 16: ...Q2M Thermo 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 S...

Page 17: ...NOTES NOTES...

Page 18: ...4PW23689 1C Copyright Daikin...

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