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15

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(Check a malfunction code in the remote controller connected to the 
indoor unit.)

• There might be a problem with the connection or transmission 

between the indoor unit and the remote controller.
Check connections, and check for wire breakage.

CAUTION

<To piping technician>
<To electrician>

After finishing the test run and before using the unit by cus-
tomer, confirm that the front panel and screws are attached 
securely to the unit.

10. CAUTION FOR REFRIGERANT LEAKS

DANGER

• Refrigerant gas is heavier than air and replaces oxygen. A massive 

leak could lead to oxygen depletion, especially in basements, and an 
asphyxiation hazard could occur leading to serious injury or death.

(Points to note in connection with refrigerant leaks)

Introduction

The installer and system specialist shall secure safety against 
leakage according to local regulations or standards. The following 
standards may be applicable if local regulations are not available.

The Split System, like other air conditioning systems, uses R410A as 
refrigerant. R410A itself is an entirely safe non-toxic, non-combustible 
refrigerant. Nevertheless care must be taken to ensure that air condi-
tioning facilities are installed in a room which is sufficiently large. This 
assures that the maximum concentration level of refrigerant gas is not 
exceeded, in the unlikely event of major leak in the system and this in 
accordance to the local applicable regulations and standards.

Maximum concentration level

The maximum charge of refrigerant and the calculation of the maximum 
concentration of refrigerant is directly related to the humanly occupied 
space in to which it could leak.

The unit of measurement of the concentration is lb./ft

3

 ( the weight in lb. 

of the refrigerant gas in 1ft

3

 volume of the occupied space).

Compliance to the local applicable regulations and standards for the 
maximum allowable concentration level is required.

Pay a special attention to the place, such as a basement, etc. 
where refrigerant can stay, since refrigerant is heavier than air.

Procedure for checking maximum concentration

Check the maximum concentration level in accordance with steps 1 to 4 
below and take whatever action is necessary to comply.

1.

Calculate the amount of refrigerant (lb.) charged to each system
separately.

When a malfunction code is displayed in the remote controller

Malfunction

code

Cause

Solution

E3

The stop valves 
in the outdoor 
unit remain 
closed.

Open the stop valve on both the 
gas and liquid lines.

The refrigerant is 
overcharged.

Calculate again the required 
amount of refrigerant to be 
charged based on the piping 
length, recover the refrigerant 
using the refrigerant recovery 
device, then achieve proper 
amount of refrigerant.

E4
F3

The stop valves 
in the outdoor 
unit remain 
closed.

Open the stop valve on both the 
gas side and liquid side.

The operation mode 
on the remote control-
ler was changed 
before the check 
operation.

Set the operation mode on all 
indoor unit remote controllers to 
“cooling.”

The refrigerant is 
insufficient.

• Check whether additional 

refrigerant charge has been 
finished correctly.

• Calculate again the required 

amount of refrigerant to be 
charged based on the piping 
length, then charge additionally 
proper amount of refrigerant.

F6

The refrigerant is 
overcharged.

Calculate again the required 
amount of refrigerant to be 
charged based on the piping 
length, recover the refrigerant 
using the refrigerant recovery 
device, then achieve proper 
amount of refrigerant.

U3

The check 
operation has not 
performed.

Perform the check operation.

U4

The power is not 
supplied to the 
outdoor unit.

Connect correctly the power sup-
ply wiring of the outdoor unit.

UA

Improper type of 
indoor unit is 
connected.

Check the type of indoor unit 
currently connected.  If it is not 
proper, replace it with proper 
one.

UF

The stop valves 
in the outdoor 
unit remain 
closed.

Open the stop valve on both the 
gas and liquid lines.

The piping and 
wiring of the 
indoor unit are 
not connected 
correctly to the 
outdoor unit.

Confirm that the piping and 
wiring of the indoor unit are con-
nected correctly to the outdoor 
unit.

The operation mode 
on the remote control-
ler was changed 
before the check 
operation.

Set the operation mode on 
indoor unit remote controller to 
“cooling.”

UH

The transmission 
wiring is not 
connected 
correctly.

Connect correctly the transmis-
sion wiring to the F1 and F2 
(TO IN/D UNIT) terminals on 
the PC board (A1P) in the 
outdoor unit.

When nothing is displayed in the remote controller

amount of refriger-
ant in the unit 
(amount of refrig-
erant with which 
the system is 
charged before 
leaving the factory)

+

additional charging 
amount (amount of 
refrigerant added 
locally in accordance 
with the length or 
diameter of the refrig-
erant piping and type 
of indoor unit)

=

total amount 
of refriger-
ant (lb.) in 
the system

Direction of the refrigerant flow

Room where 
refrigerant leak 
has occurred 
(outflow of all the 
refrigerant from 
the system)

01_EN_3PN07193-9P.fm  Page 15  Tuesday, June 6, 2017  3:56 PM

Summary of Contents for RZR36PVJU8

Page 1: ...avant l installation Conserver ce manuel port e de main pour r f rence ult rieure Ce manuel doit tre donn au propri taire de l quipement Lea cuidadosamente estas instrucciones antes de instalar Guarde...

Page 2: ...ult in water leakage elec tric shock or fire When installing the unit in a small room take measures to keep the refrigerant concentration from exceeding allowable safety limits Excessive refrigerant l...

Page 3: ...as thinner or gasoline are handled Oper ating the unit in such conditions can cause a fire Take adequate measures to prevent the outdoor unit from being used as a shelter by small animals Small animal...

Page 4: ...whose velocity is 11 mph or more blows to the out door unit from the air outlet side the air flow rate of the outdoor unit is reduced the outlet air is sucked again short circuit and the following eff...

Page 5: ...conduit and servicing between the units A When an obstruction is present on the air inlet side When the upward area is open 1 When one outdoor unit is installed individually When an obstruction is pr...

Page 6: ...utdoor unit is installed individually The dimensional relationship between H L and A is as shown in the table below NOTE Close the area under the frame so that the outlet air does not bypass there 2 W...

Page 7: ...2 Only two outdoor units can be installed side by side D When outdoor units are stacked 1 When an obstruction is present on the air outlet side NOTE 1 Only two outdoor units can be stacked 2 About 4 i...

Page 8: ...ng nut 3 Remove the transportation metal and the washer as shown in the above figure 4 Return and tighten the fixing nut again 5 Return the sound proof cover to achieve the former status CAUTION If th...

Page 9: ...than the specified refrigerant enter the refrigerant system Do not let any gas such as air enter the refrigerant system Precautions when connecting the piping See the following table for flare dimens...

Page 10: ...nditioner at 14 6 psi or less for 1 hour or more and confirm that the vacuum pressure indi cated by the vacuum gage does not increase If the vacuum pressure increases the system may contain moisture o...

Page 11: ...counterclockwise 2 When the valve stem cannot be turned any more stop turning Now the valve is open How to close the stop valve 1 Insert a hexagon wrench into the valve stem and turn the valve stem c...

Page 12: ...supply wiring and transmission wiring Let the power supply wiring and transmission wiring with a conduit pass through one of the knockout holes on the front or side piping cover and let the transmiss...

Page 13: ...e below for tightening torque for the terminal screws Model Phase and frequency Voltage Max Overcurrent Protective device Min Circuit Amps RZQ30PVJU7 1 60Hz 208 230V 30A 27A RZQ36PVJU8 RZR36PVJU8 RZQ4...

Page 14: ...ORK 5 Piping size and heat insulation Refer to 6 1 Selection of piping material 6 5 Heat insulation of piping 6 Check of stop valve Confirm that the stop valve is open on both the liquid line and gas...

Page 15: ...outdoor unit may continue to operate for a further 3 minutes If the system has not undergone the check operation by the test run button since it was first installed a malfunction code U3 is dis playe...

Page 16: ...in the outdoor unit remain closed Open the stop valve on both the gas and liquid lines The refrigerant is overcharged Calculate again the required amount of refrigerant to be charged based on the pipi...

Page 17: ...ions in steps 1 and 2 above 4 Deal with the situations where the result exceeds the maximum con centration level Where the installation of a facility results in a concentration in excess of the maximu...

Page 18: ...1707 HT 3PN07193 9P EM17A016 00_CV_3PN07193 9P fm Page 2 Tuesday June 6 2017 3 52 PM...

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