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12. M
AINTENANCE AND SERVICING
12.1. Service precautions
WARNING: ELECTRIC SHOCK
Caution when performing service to inverter equipment
Do not touch live parts for 10 minutes after the power supply is
turned off because of high voltage risk.
Additionally, measure the points as shown in
tester and confirm that the voltage of the capacitor in the main
circuit is no more than 50 V DC.
Make sure that the power supply is turned off before performing
the maintenance work. The heater of the compressor may
operate even in stop mode.
Please note that some sections of the electric component box
are extremely hot.
In order to prevent damage to the PCB, first eliminate static
electricity by touching a metal part (e.g. stop valve) with your
hand. Then pull out the connector.
After measuring the residual voltage, pull out the outdoor fan
connector.
Make sure you do not touch a conductive section.
The outdoor fan may rotate due to strong backblow wind,
causing the capacitor to charge. This may result in an electric
shock.
After maintenance, make sure the outdoor fan connector is
connected again. Otherwise, the unit may break down.
Play it safe!
Touch a metal part by hand (such as the stop valve) in
order to eliminate static electricity and to protect the PCB
before performing service.
12.2. Service mode operation
If required, carry out any service mode operation according to the
following instructions. Refer to the service manual for more details.
Setting the mode
The set mode can be changed with the
to the following procedure:
For setting mode 1: Press the
x
H1P LED is off
.
For setting mode 2: Press the
5 seconds, the H1P LED is on
c
If the H1P LED is blinking
once, the setting mode will change to setting mode 1.
NOTE
If you get confused in the middle of the setting
process, push the
setting mode 1 (H1P LED is off).
Location of the dip switches, LEDs and buttons
1
Led H1P~H8P
2
Push button switches BS1~BS5
3
DIP switches
(do not use or change)
LED state
Throughout the manual the state of the LEDs is indicated as follows:
x
w
OFF
ERSQ+ERRQ011~016AAV1+Y1
Outdoor unit for air to water heat pump
4PW49635-1A
figure 10
button according
BS1 MODE
button once, the
BS1 MODE
button for
BS1 MODE
w
.
and the
button is pushed
BS1 MODE
button. Then it returns to
BS1 MODE
1
2
c
ON
blinking
Setting the mode
1
Push the
(refrigerant recovery operation/vacuuming operation) to
(ON).
The H3P, H5P and H7P LEDs are on.
2
When the
indicating the current setting.
with a
3
To set this function
button as shown below.
4
Push the
BS3 RETURN
5
When the
BS3 RETURN
starts according to the setting.
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1
When the unit is at a standstill and under the setting mode 2, set
the required function (refrigerant recovery operation/vacuuming
operation) to
-
After this is set, do not reset the setting mode 2 until the
vacuuming is finished.
-
The H1P led is on and the remote controller indicates
(test operation) and
operation will be prohibited.
2
Vacuum the system with a vacuum pump.
3
Press the
BS1 MODE
Refrigerant recovery operation method by a refrigerant
reclaimer.
1
When the unit is at a standstill and in setting mode 2, set the
required function (refrigerant recovery operation/vacuuming
operation) to
-
The indoor unit and the outdoor unit expansion valves will
fully open and some solenoid valves will open.
-
The H1P led is on and the remote controller indicates
(test operation) and
operation will be prohibited.
2
Recover the refrigerant using a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
3
Press the
BS1 MODE
CAUTION
Never turn the power of the outdoor unit OFF while the
3
3
refrigerant is being recovered.
If the power is turned OFF, the solenoid valves are closed
and the refrigerant cannot be recovered from the outdoor
unit.
button to set the required function
BS2 SET
H1P H2P H3P H4P H5P H6P H7P
w x w x w x w
button is pushed, the LEDs are
BS3 RETURN
(ON) or
(OFF), push the
ON
OFF
H1P H2P H3P H4P H5P H6P H7P
w x x x x c x
ON
(a)
w x x x x x c
OFF
(a) This setting = factory setting
button and the setting is defined.
button is pushed again, the operation
(ON).
ON
(external control) and the
button and reset the setting mode 2.
(ON).
ON
(external control) and the
button and reset the setting mode 2.
ON
BS2 SET
Installation manual
16
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