Installation manual
14
ERX125~250A7W1B
Inverter condensing unit
4PW30064-1D
4
Final adjustment of the amount of refrigerant
■
When the unit displays an out of temperature range, the
charging of refrigerant can not be completed.
■
Out of outdoor temperature range
Complete the charging of refrigerant on another time when
the outdoor temperature is warmer than 0°C DB and colder
than 43°C DB.
■
Out of indoor temperature range
Complete the charging of refrigerant on another time when
the indoor temperature is warmer than 20°C DB and colder
than 32°C DB.
In this case, perform a test operation (as explained in the
chapter
"12.4. Test operation" on page 16
properly. (The malfunction code
U3
will be displayed on the
remote controller (when attached).)
■
When the temperature has come in range (outdoor = 0~43°C,
indoor
=
20~32°C), perform the overcharging judgement
procedure for completion of the refrigerant charging operation.
Overcharging judgement procedure
1.
Close all the front panels except the electric box front panel
and the lid on the side of the electric box.
2.
Turn on the power to the outdoor unit and all the connected
units.
3.
Press the
button once and set the setting
model H1P = OFF.
4.
Press and hold the
button down for 5 seconds.
5.
The system will start operating.
6.
Close all the front panels.
After operating for 40 minutes, the operation will stop
automatically.
7.
After the system has stopped operating, check the display
on the remote controller.
8.
If
E3
,
F6
or
UF
is displayed on the remote controller as a
result of the overcharge judging operation, recover 20% of
the charged amount of refrigerant and perform the
overcharge judgement procedure again.
■
When there is no more overcharging of refrigerant detected,
restart the refrigerant charging from the start as explained in
"11.4. Additional refrigerant charge" on page 12
11.5. Checks after adding refrigerant
■
Are the stop valves for both liquid and gas open?
■
Is the amount of refrigerant, that has been added, recorded?
12. B
EFORE
OPERATION
12.1.
Service precautions
Pay attention to the fan. It is dangerous to inspect the unit while the
fan is running. Be sure to turn off the main switch and to remove the
fuses from the control circuit located in the outdoor unit.
H1P
H2P
H3P
H4P
H5P
H6P
H7P
w c c c w x
x
H1P
H2P
H3P
H4P
H5P
H6P
H7P
w c c c x w x
Make sure to open the stop valves after charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
BS1 MODE
BS4 TEST
WARNING: ELECTRIC SHOCK
Caution when performing service to inverter
equipment
1
Do not open the electric box cover for 10 minutes after
the power supply is turned off.
2
Measure the voltage between terminals on the
terminal block for power supply with a tester and
confirm that the power supply is shut off.
In addition, measure the points, as shown in the figure
below, with a tester and confirm that the voltage of the
capacitor in the main circuit is less than 50 V DC.
3
To prevent damaging the PC-board, touch a
noncoated metal part to eliminate static electricity
before pulling out or plugging in connectors.
4
The performing of the service to the inverter
equipment must be started after the junction
connectors X1A, X2A, X3A, X4A (X3A and X4A are
for 14~18 unit type only) for the fan motors in the
outdoor unit are been pulled out. Be careful not to
touch the live parts.
(If a fan rotates due to strong wind, it may store
electricity in the capacitor or in the main circuit and
cause electric shock.)
5
After the service is finished, plug the junction
connector back in. Otherwise the error code
E7
will be
displayed on the remote controller and normal
operation will not be performed.
For details refer to the wiring diagram labeled on the back
of the electric box cover.
NOTE
Play it safe!
For protection of the PCB, touch the switch box casing
by hand in order to eliminate static electricity from your
body before performing service.
A2P
A2P
A1P
A3P
TP1 TP2
