Test Run; Special Functions; System Control (Fig. 9-1) - Mitsubishi Electric Mr.SLIM PU-P HA Série Manuel D'installation

7. Test run

7.2. Test run
7.2.1. Using SW4 in outdoor unit
1) PUH Type
SW4-1 ON
Cooling operation
SW4-2 OFF
SW4-1 ON
Heating operation
SW4-2 ON
2) PU Type
SW4-1 ON
Cooling operation
SW4-2 ON or OFF
* After performing the test run, set SW4-1 to OFF.
• After power is supplied, a small clicking noise may be heard from the inside of the
outdoor unit. The electronic expansion valve is opening and closing. The unit is not
faulty.

8. Special Functions

8.1. Refrigerant collecting (pump down)
Perform the following procedures to collect the refrigerant when moving the indoor
unit or the outdoor unit.
1 Supply power (circuit breaker).
* When power is supplied, make sure that "CENTRALLY CONTROLLED" is not
displayed on the remote controller. If "CENTRALLY CONTROLLED" is dis-
played, the refrigerant collecting (pump down) cannot be completed normally.
2 After the gas stop valve is closed, set the SW1-1 switch on the control board of
the outdoor unit to ON. The compressor (outdoor unit) and ventilators (indoor and
outdoor units) start operating and refrigerant collecting operation begins. LED1
and LED2 on the control board of the outdoor unit are lit.
* Only set the SW1-1 switch to ON if the unit is stopped. However, even if the
unit is stopped and the SW1-1 switch is set to ON less than three minutes
after the compressor stops, the refrigerant collecting operation cannot be per-
formed. Wait until compressor has been stopped for three minutes and then
set the SW1-1 switch to ON again.

9. System control (Fig. 9-1)

E SW 1 - 3 ~ 6
ON
OFF
3 4 5 6
F SW 1 - 3 ~ 6
ON
OFF
3 4 5 6
G SW 1 - 3 ~ 6 ON
OFF
3 4 5 6
A E A F
TB1 TB1
TB4 TB4 TB4
B B B
2
2
TB5 TB5
1
C D
1
Fig. 9-1
A Outdoor unit
B Indoor unit
C Master remote controller
D Subordinate remote controller
E Standard 1:1 (Refrigerant address = 00)
F Simultaneous twin (Refrigerant address = 01)
G Simultaneous triple (Refrigerant address = 02)
A G
TB1
TB4 TB4 TB4
B B B
TB5
• A few seconds after the compressor starts, a clanging noise may be heard from the
inside of the outdoor unit. The noise is coming from the check valve due to the small
difference in pressure in the pipes. The unit is not faulty.
• A low knocking sound might be heard from the Fan Section of this unit during the
test run.
This is caused by the torque fluctuating to control the Fan revolutions. This is not a
defect in the unit.
The test run operation mode cannot be changed by DIP switch SW4-2 during
the test run. (To change the test run operation mode during the test run, stop
the test run by DIP switch SW4-1. After changing the test run operation mode,
resume the test run by switch SW4-1.)
7.2.2. Using remote controller
Refer to the indoor unit installation manual.
3 Because the unit automatically stops in about two to three minutes after the refrig-
erant collecting operation (LED1 and LED2 are lit), be sure to quickly close the
gas stop valve. When LED1 and LED2 are lit and the outdoor unit is stopped, open
the liquid stop valve completely, and then repeat step 2 after three minutes have
passed.
* If the refrigerant collecting operation has been completed normally (LED1 and
LED2 are lit), the unit will remain stopped until the power supply is turned off.
4 Turn off the power supply (circuit breaker).
* Set the refrigerant address using the DIP switch of the outdoor unit.
1 Wiring from the Remote Control
This wire is connected to TB5 (terminal board for remote controller) of the indoor unit
(non-polar).
2 When a Different Refrigerant System Grouping is Used.
Up to 16 refrigerant systems can be controlled as one group using the slim MA re-
mote controller.
Note:
In single refrigerant system (twin/triple), there is no need of wiring 2.
SW1
Function table
1 Compulsory de-
frosting
<SW1>
SW1
2 Error history clear
function
ON
3 Refrigerant sys-
settings
OFF
tem address set-
4
1 2 3 4 5 6
ting
5
6
Operation according to switch setting
Function
ON
Start Normal
Clear Normal
Settings for outdoor unit ad-
dresses 0 to 15
OFF
9