Maintenance Of Indoor Unit; Ducted High Static Type ((H,Y)Idh018 - 048B21S); Removing Long-Life Filter; Removing Pcb - York HIDS006B21S Service Manual

4.2 Maintenance of Indoor Unit

Use the specified non-flammable refrigerant for the outdoor unit in the refrigerant system.
Do not charge material other than the specified refrigerant into the unit such as hydrocarbon
refrigerants (propane), oxygen, flammable gases (acetylene), or poisonous gases when
installing, maintaining or transporting. These flammables are extremely dangerous and may
cause an explosion, fire, and injury.
4.2.1

Ducted High Static Type ((H,Y)IDH018 - 048B21S)

4.2.1.1

Removing Long-Life Filter

The air inlet grilles are field-supplied. How easy it is to access these filters will depend on the installations
or location of the equipment. Check it carefully.
4.2.1.2

Removing PCB

(1) Loosen two M4 screws securing the electrical box cover and remove the electrical box cover by lifting
it upward.
(2) There are three PCBs. PCB1 (control PCB) and PCB2 are secured with four PCB holders. Clamp the
center of the PCB holders using a long-nose plier
and pull out the PCB.
● (H,Y)IDH018B21S
PCB2
PCB3
TB2
ATTENTION:
Do not touch any components on the PCB.
Do not apply excessive force to the PCB or it will cause a malfunction.
SM-18001-rev.1
TURN OFF all POWER supply switches.
Electrical Box Cover
Connector for
Flat Switch
Connector for
Thermistor
Connector for
Expansion Valve
PCB1
L1 L2
TB1
Tool Phillips Screwdriver
Screws
Tool Phillips Screwdriver, Long-nose Pliers
● (H,Y)IDH024 - 048B21S
PCB2
TB2
MAINTENANCE
(Ducted High Static Type)
Connector for
Thermistor
Connector for
Flat Switch
PCB1
Connector for
Expansion Valve
PCB3
TB1
4-3