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Starting the Heat Pump System
Carry out a final inspection to ensure that all wiring is in accordance with Wiring
Diagram 1, 2, 3 or 4 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 outdoor unit and
the local electrical supply to the air curtain.
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-W21MAA or PAR-31MAA
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.
If a door switch has been installed to change fan speeds from High (door open) to Low
(door closed) check this operates correctly.
If the remote 3-Speed fan switch has been installed check that the fans run at HIGH
speed, MEDIUM speed and LOW speed by operating the slider switch.
If there is no door switch or remote 3-Speed fan switch a wire link will have been fitted
to the fan speed terminals on the air curtain. Set the wire link to one of the three fan
speeds (LOW, MED or HIGH) appropriate to the site conditions (see Section "Selecting
the fan speeds"). Check there is no mechanical noise coming from the fans at any of the
fan speeds and that all fans are working.
If the Air Curtain is set-up for :-
Weather Compensation Control (HEATING ECO mode)
Discharge Air Temperature Control (HEATING mode)
Switch the Mode Button on the PAR-W21MAA to 'HEATING' mode (Discharge Air
Temperature Control) and adjust the target temperature to 40°C 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 15 minutes of operation and that the air
stream reaches right down across the doorway with the door open or closed.
NB. Cooling is not possible with Weather Compensation Control (HEATING ECO
mode) or with Discharge Air Temperature Control (HEATING mode).
T9901105-1-1 UK
DANGER: Beware of Fans Starting!
(this is how the air curtain is supplied)
with a PAR-W21MAA Remote Controller :-
or
Page 27 of 42
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