Mitsubishi Electric thermoscreens HX2-S/M 1000 DXE Installation, Operation & Maintenance Instructions Manual page 32

The indicator states are outlined below:
Indicator State
GREEN FLASH
RED ON
RED FLASH
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).
The factory set default schedule is suitable for most applications. However, the actual
frequency of cleaning required will depend on the environment. Two alternative filter
indicator schedules are available, and can be selected by changing the 'jumper' position
(marked 1, 2 or 3) on the Filter Indicator PCB.
Filter Indicator Schedule
Jumper position
Inlet grille vacuum interval
Filter service interval
To access the Filter Indicator PCB to change jumper position:-
Switch off the electrical power to the Air Curtain. Open the
access panel underneath the unit, see 'To gain access inside
the Air Curtain'. Remove air filter adjacent to filter indicator
PCB.
Remove filter indicator PCB and set position of jumper. Refit
in reverse order.
T9901105-1-1 UK
Indicator Light
On 0.5s; Off 3s
On permanently
On 0.5s; Off 0.5s
START
240 hrs
RED ON: Quick reset
240 hrs
RED ON: Quick reset
240 hrs
RED ON: Quick reset
240 hrs
RED FLASH: Hold 5s to reset
Half
Period
   
1 2 3
120 hrs
480 hrs
Action Required
None
Vacuum inlet
Service filters
Default
Period
   
1 2 3
240 hrs
960 hrs
Reset Button
N/A
Quick reset
Press for 5s
Double
Period
   
1 2 3
480 hrs
1920 hrs
Jumper
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