T9901085-1-3 UK
Page 28 of 38
If the air curtain is to be operated from a BMS System or Centralised Controller this
should be configured so that the air curtain can only operate in HEAT or FAN mode if it
is not fitted with a condensate disposal system. The air curtain should only be
configured to operate in COOL mode if it is fitted with a condensate disposal system.
Switch off the electrical power to the Air Curtain and the Mitsubishi Electric Outdoor
Unit. Carefully slide the Interface PCB back into place and re-plug the Filter Indication
connection into CN105 if removed earlier. Ensure cables are not trapped inside and refit
the retaining screw.
Filter Dirty Indicator
The air curtain is fitted with a Filter Dirty Indicator. It is located at
the left-hand end of the outlet grille and signals when the air
curtain inlet grille/filters should be vacuum cleaned or the air
curtain requires servicing.
NB
.The filter dirty interval feature on the Mitsubishi Electric remote
controller is not available.
The indicator states are outlined below:
Indicator State
Indicator Light
Action Required
Reset Button
GREEN FLASH
On 0.5s; Off 3s
None
N/A
RED ON
On permanently
Vacuum inlet
Quick reset
RED FLASH
On 0.5s; Off 0.5s
Service filters
Press for 5s
The filter indicator schedule is based on fan operating hours. For the default schedule,
shown schematically below, the inlet grilles should be vacuum cleaned every 240hrs of
fan operation (3 to 4 weeks depending on use) and a full service should take place
every 960hrs of fan operation (4 to 6 months depending on use).
START
240 hrs
240 hrs
240 hrs
240 hrs
96
0 hrs
RED ON: Quick reset
RED ON: Quick reset
RED ON: Quick reset
RED FLASH: Hold 5s to reset
Fan o
pe
rat
in
g
ho
urs
MT2
