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Starting the Heat Pump System
Carry out a final inspection to ensure that all wiring is in accordance with Wiring
Diagrams and that all connections have been properly made. Ensure that the refrigerant
system is complete, there are no leaks and there is sufficient charge of refrigerant
R410A. Switch on electrical power to the Mitsubishi Electric compressor unit and other
City Multi system components. Wait 30 seconds and switch on electrical power to the
air curtain at the local isolator.
WARNING! The Interface PCB inside the air curtain will have 230 volts on it and there
will be 400V on some air curtain terminals if the defrost cycle auxiliary heater is
enabled.
The system will 'boot-up' and when the screen on the PAR-31MAA or PAR-U02MEDA
Remote Controller becomes active it will repeat the message "PLEASE WAIT". After
several minutes when the PLEASE WAIT message has stopped the system is ready to
start.
Turn the air curtain on using the ON/Off Button on the Remote Controller and the air
curtain fans will start straight away. Using the Fan Speed Button on the remote
controller check that the fans run at HIGH speed, MEDIUM speed and LOW speed and
there is no mechanical noise coming from the fans at each of the three fan speeds. If a
door switch has been installed to change fan speeds from High (door open) to Low
(door closed) check this operates correctly. Switch the Mode Button on the remote
controller to 'HEAT' and adjust the target temperature to 28°C maximum setting using
the + Temp. Button. Check that the air stream from the discharge grille warms up
across the whole length of the air curtain after approximately 20 minutes of operation
and that the air stream reaches right down across the doorway with the door open or
closed.
If fitted, adjust the airstream vanes at each end of the discharge grille as shown in the
diagram.
T9901075-2-3 UK
DANGER: Beware of Fans Starting!
HX2 unit shown for illustration only
Adjustable
Airstream Vanes
Angled
airstreams
project into
un-protected
gap at end of
air curtain
Main
airstream
Standard outlet
grille projects main
airstream straight
down
Adjustable
Airstream Vanes
at each end of the
standard outlet
grille
Angled airstreams
project into
un-protected gap at
end of air curtain
Page 27 of 38
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