Fujitsu AUXB04GALH Service Manual page 7

Execution 2/2
Addition refrigerant charging
Gas leak test
Initial setting
Piping length setting
Address setting for Signal Amp
- When using signal Amps -
Address setting for Indoor unit
Indoor unit connection check
Test run & adjustment
Turnover & explanation of operation
Execution procedure and precautions
1 Confirm the additional refrigerant amount with the installation
manual, etc.
Always take the R410A refrigerant from the cylinder liquid phase
2
and charge it using the gas phase.
(Do not lay a cylinder with siphon pipe on its side.)
3 Use an R410A dedicated gauge manifold and charging hose.
4 Charge refrigerant using the liquid pipe.
5 When the defined amount of refrigerant cannot charge using the
liquid pipe, charge refrigerant using the gas pipe while opearting
the cooling test run.
Charge refrigerant bit by bit with cautious operation of valve
for the liquid refrigerant back prevention.
Use an R410A dedicated leak tester to check for gas leaks.
1 Set the refrigerant circuit address.
ROTARY SW: REF ADX10, X1
2 Confirm the DIP SW setting
SET 1: Factory setting, SET 2 : All OFF
Confirm the Terminal resister setting
3
SET 5-4 OFF: Disable, ON: Enable
[Note] Perform in the power OFF state.
Set according to the length of the connection piping.
Set to "Standard 40 to 65m" at the factory.
Set using the push button SW on the outdoor unit main PCB.
< Refer to the Page 01-17 Setting mode F2-00 >
Set the pipe length to be the nearest indoor unit from the outdoor unit
[Note] Perform in the power ON state after all indoor units have stopped operation
When setting the address of Signal amplifier, please refer to the
installation manual of the signal amplifier.
The address setting can be set by automatically from 1 outdoor unit
on the network. < Refer to the Page 01-06 Setting mode F3-10 >
[Note] Manual setting: Set the rotary SW on the PCB in the power OFF state.
Perform setting by push button SW on the outdoor unit Main PCB in the
Automatic address setting:
power ON state after all indoor units have stopped operation.
Set the refrigerant circuit address and indoor unit address.
Can be set by rotary SW on the indoor unit PCB ( Main PCB or Switch
PCB) or from a remote controller or from a push button SW on the
outdoor unit Main PCB < Automatic address setting,
Refer to the Page 01-07 Setting mode F3-11>
[Note] Manual setting: Set the rotary SW on the PCB in the power OFF state.
Perform setting by push button SW on the outdoor unit Main PCB in the
Automatic address setting:
power ON state after all indoor units have stopped operation.
Before starting the system, check on the number of indoor units and
the total capacity.
< Refer to the Page 01-08 Setting mode F3-12 >
[Note] Perform setting by push button SW on the outdoor unit Main PCB in the power ON state
after all indoor units have stopped operation.
01-02
Reason
If taken from the air phase, since the
composition of the refrigerant which is
charged will change, low performance
and abnormal stop will occur easily.
Prevent erroneous sealing in of
refrigerant.
A leak tester for other than R410A
cannot detect leaks.
Dual address setting No. is not
allowed in one network.
If the DIP SW setting is wrong, the sys-
tem may not work correctly
If the Terminal resister setting is wrong,
the system may detect transmission
error
When the setting is not same as the
real piping length, the system may
not work correctly.
If the pipe length is set as the farthest
indoor unit, the nearest operating
indoor unit may be stopped the
operation by the icing up protection
as by over cooling.
Dual address setting No. is not
allowed in one network.
Dual address setting No. is not
allowed in one network.
Normal operation will not be possible
without performing the indoor unit
connection check.