Daikin LREQ15B7Y1R, Installation Manual

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Installation manual
21
20B7Y1R
Air cooled refrigeration condensing unit
4P360438-1B – 2014.01
12. TEST RUN
For test run operators
Do not operate the outdoor unit alone on a trial basis.
In a multi-system, all units work together. It is not possible to operate
the master or a slave unit seperately.
Test run procedure
Use the following procedure to perform a test run after installation
work is complete for the entire system:
1.
Fully open the shutoff valves on the gas and liquid sides of both
master and slave unit.
2.
Set the operation switch of the master unit to ON.
Note: Before turning power on, check that the piping cover and
control box lid of the outdoor unit are closed.
3.
Check the sealing condition of the outdoor unit through the sight
glass. Make sure that the amount of refrigerant is sufficient.
4.
Make sure that cold air blows from the indoor unit.
Check that the internal temperature is dropping.
(Check that the temperature will drop and reach the set
temperature in the internal unit.
Check that the indoor unit (for refrigeration or freezing) goes into
defrosting operation.
5.
Turn power off with the operation switch of the outdoor unit set to OFF.
(Stopping unit operation by disconnecting the power supply directly
is dangerous. When the unit is stopped in this manner, its power
outage compensation function may cause it to resume operation as
soon as the power supply is reactivated. Additionally, stopping the
unit in this manner may cause the compressor to fail).
Error diagnosis
• If the system cannot operate normal at the time of test run (i.e., the
H2P indicator is lit), check with malfunction code on the system
with the pushbutton switches on the PCB of the outdoor unit, and
take the following steps.
• Check the LED display of the master unit for both master and slave
unit errors.
If an error occurs, the LEDs of the master unit display can light up in
the following ways:
Take action according to the status of LED(H7P):
• If H7P is lit, check the malfunction code on the PCB of the
master unit.
• If H7P is not lit, check the malfunction code on the PCB of the
slave unit.
• If H7P is blinking, check the malfunction codes on both the PCB
of the master unit and that of the slave unit.
• To check the malfunction code on one of the PCB’s, refer to
"How to check malfunction code" on page 21 .
• If one of the units stops functioning due to a compressor
malfunction, the non-malfunctioning unit will also stop.
How to check malfunction code
By operating the pushbutton switches on the PCB, malfunction
code items can be displayed on the condensing unit.
1. Make sure that the LED “H1P” is off.
(If the LED is on, press the MODE button (BS1) once.)
2. Press the MODE button (BS1) once. The LED (H1P) starts
blinking.
3. Press the RETURN button (BS3) to display the first digit of the
malfunction code on the LED.
4. Press the SET button (BS2) to display the second digit of the
malfunction code on the LED.
5. Press the MODE button (BS1) to restore the LED to the original
state.
*1
Set the operation switch of the master unit to the OFF position to reset
the power supply and then return the operation switch of the master
unit to the ON position to restart the unit. If the problem persists, refer
to the Service Manual.
*2
If a transmission error occurs for 2 continuous minutes, the system will
stop. The corresponding malfunction code is displayed 10 minutes
after the onset of the error.
CAUTION
• Do not disconnect the power supply for 1 minute after setting the
operation switch to ON.
Electric leak detection is performed for several seconds after the
operation switch is set to ON and each compressor starts
operating, so disconnecting the power supply during that time will
result in a false detection.
For dealers
• After the test run is finished, check that the piping cover and front
panel are mounted.
• At the time of delivery to the customer, use the operation manual
and fully explain the handling of the equipment.
• For precautions at the time of delivery, refer to the provided
installation manual for each unit as well.
LED (H2P)
LED (H7P)
LED (H2P): ON
LED (H7P): ON
Master unit malfunction
LED (H2P): ON
LED (H7P): OFF
Slave unit malfunction
LED (H2P): ON
LED (H7P): blinking
Master and slave unit
malfunction
BS1
MODE
BS2
SET
BS3
RETURN
BS4
TEST
BS5
RESET
LED indication
(BS3 switch pressed once) (BS2 switch pressed once)
H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P
Installation failure Remedy
The shutoff valves
were left closed.
Refrigerant shortage
Over frost formation.
Miss selection of
expantion valves.
(wet alarm)
Check the
indoor unit.
The passage of air
is blocked.
Reverse-phase wiring
of power supply
Voltage drop
Fully open the
shutoff valves.
Execessive
refrigerant charging
Adjust the amount
of the refrigerant to
an appropriate level.
Charge additional
refrigerant.
The shutoff valves
were left closed. Fully open the
shutoff valves.
Remove obstacles that
block the passage of air.
Exchange two wires out of
the three power supply wires.
Make a voltage
drop check.
See *1 below.
Verify power supply
wiring connections.
– Check if the master is properly
designated.
– Check the transmission wiring.
Electric leak
Transmission
setting error (*2)
Open L2 phase
Open L1 phase Normal monitor (HAP) LED off.
OFF ON BLINK