Service / clean filters 2 Mitsubishi split systems

Hi, I have 2 Mitsubishi split systsms (one making a "singing" noise) require filers cleaning. Need a ladder. Thanks

MAINTENANCE OF AIR CONDITIONER
MAINTENANCE OF AIR CONDITIONER

REVERSE CYCLE AIRCONDITIONER TO BE SERVICED AND FI
REVERSE CYCLE AIRCONDITIONER TO BE SERVICED AND FIXED

AIRCONDITIONER REPAIR
AIRCONDITIONER REPAIR

OFFICE A/C - TEMPERATURE CNTRL NOT WORKING (NOT COLD)
OFFICE A/C TEMPERATURE CONTROL NOT WORKING - WON'T COOL DOWN. SETTING IS 0 ON...