York CIDH018B21S, Service Manual

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(Ducted High Static Type)
MAINTENANCE
SM-18001-rev.1
4-3
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.
(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.
Phillips Screwdriver, Long-nose Pliers Tool
ATTENTION:
Do not touch any components on the PCB.
Do not apply excessive force to the PCB or it will cause a malfunction.
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.
Phillips Screwdriver Tool
Electrical Box Cover
Screws
PCB2
PCB3
TB2
TB1
PCB1
Connector for
Flat Switch
Connector for
Expansion Valve
Connector for
Thermistor
L2 L1
B A 2 1
4.2 Maintenance of Indoor Unit
● (H,Y)IDH018B21S ● (H,Y)IDH024 - 048B21S
4.2.1 Ducted High Static Type ((H,Y)IDH018 - 048B21S)
TB2
TB1
PCB3
PCB2
PCB1
Connector for
Flat Switch
Connector for
Expansion Valve
Connector for
Thermistor
1
B
A
2
L2
L1
TURN OFF all POWER supply switches.