Mitsubishi Heavy Industries SRK20ZIX-S Service Manual page 57

4 Pass the connecting wire through the wiring holder.
Concealed installation
Install the indoor unit according to the following instructions.
1 Secure the upper, right, and left spaces according to the right figure.
2 Do not let the horizontal bar obstruct wind from blowing out
upward/downward or reception from the remote controller.
3 The lattice size should be 70 % or greater of the open rate.
4 Cut the jumper cable (JP173) on the indoor circuit board to control
the blow-out angle.
CAUTION
Incorrect installation may cause problems such as non-cooling,
non-warming, and condensation water leaking into the room.
INSTALLATION OF REMOTE CONTROL
Mounting method of battery
CAUTION
Do not use new and old batteries together.
Fixing to pillar or wall
○ Conventionally, operate the remote control switch by
holding in your hand.
Avoid installing it on a clay wall etc.
○
INSTALLATION TEST CHECK POINTS
Check the following points again after completion of the installation, and before turning on the power. Conduct a test run again and ensure that the unit operates properly.
At the same time, explain to the customer how to use the unit and how to take care of the unit following the user's manual.
After installation
The power supply voltage is correct as the rating.
No gas leaks from the joints of the operational valve.
Power cables and crossover wires are securely fixed to the terminal board.
Operational valve is fully open.
The pipe joints for indoor and outdoor pipes have been insulated.
R Stranded core
4or5 Number of conductors
G One conductor of the cable is the earth
conductor (yellow/green)
1.5 Section of copper wire (mm )
2
JP171 CUSTOM
REMOTE/
JP170 SWITCH
AUTORESTART
JP173
AIR FLOW
JP172 COOL ONLY
Cut
6 Battery
Cover
2 Wireless remote control
5 Wood screw
3.5 16
Test run
Air conditioning operation is normal. Operation of the unit has been explained to the customer.
No abnormal noise. (Three-minutes restart preventive timer)
When the air conditioner is restarted or when changing
Water drains smoothly.
the operation, the unit will not start operating for
Protective functions are not working.
approximately 3 minutes.
The remote control is normal.
This is to protect the unit and it is not a malfunction.
Clamp
Fixing screw Wiring holder
Sensor
5cm or more 5cm or more
7cm or more
2 - 3cm
HOW TO RELOCATE OR DISPOSE OF THE UNIT
In order to protect the environment, be sure to pump down

(recovery of refrigerant).
 Pump down is the method of recovering refrigerant from the
indoor unit to the outdoor unit when the pipes are removed
from the unit.
<How to pump down>
1 Connect charge hose to service port of outdoor unit.
2 Liquid side : Close the liquid valve with hexagon wrench key.
Gas side : Fully open the gas valve
Carry out cooling operation . (If indoor temperature is low,
operate forced cooling operation.)
3 After low pressure gauge become 0.01MPa, stop cooling
operation and close the gas valve.
CONCERNING TERMINAL CONNECTION
FOR AN INTERFACE
Remove the front panel and lid of control.
1
There is a terminal (respectively marked with CNS) for the indoor control board.
2
In connecting an interface, connect to the respective terminal securely with the connection
harness supplied with an optional "Interface connection kit SC-BIKN-E" and fasten the
connection harness onto the indoor control box with the clamp supplied with the kit.
For more details, please refer to the user's manual of your "Interface connection kit
SC-BIKN-E".
slightly until the latch works.
Installing the air-cleaning filters
1. Open the air inlet panel and remove the air filters.
2. Install the filter holders, with the air-cleaning filters installed in the holders.
In the air conditioner.
• Each air-cleaning filter can be installed in the upper or lower filter holder.
3. Install the air filters and close the inlet panel.
Air-cleaning filter Filter holder
CAUTION
When installing an air-cleaning filter in the indoor unit, be careful not to injure
your hand with the heat exchanger.
Forced cooling operation
Turn on a power supply again after a while after turn off a power supply.
Then press continually the ON/OFF button 5 seconds or more.
Unit ON/OFF button