York IDM030B21E Series, Service Manual

Page: 73 / 144

SM-16005-rev.2
4-3
MAINTENANCE
TURN OFF all POWER supply switches.
(2) There are two PCBs, control PCB (PCB1) and power PCB (PCB2). Both PCBs are secured with four
PCB holders. Clamp the center of the PCB holders using a long-nose plier to pull out the PCB.
Phillips Screwdriver, Long-nose Pliers Tool
NOTE:
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 Removing PCB
(1) Loosen two M4 screws securing the electrical box cover and remove the electrical box cover by lifting
it up.
Phillips Screwdriver Tool
Electrical Box Cover
Screws
CAUTION
UTILISER DES FILS D
ALIMEN
TAT
ION EN CUIVRE.
'
ATTENTION
USE COPPER SUPPL
Y
WIRES.
87
0
9
4 3 6 5
1
32
RSW1
RSW2
98
1
0
5 4 7 6
2
6 5
5 6
DSW5
ON
1 4 2 3
1 2
ON
3 4
DSW6
CN
8
HA
CN
7
CN17 CN11 CN14 THM4 THU1 CN3 THM5 THM2 THM1 THM3 CN19 CN1
PCN7 PCN6 CN2
2
DSW7
1
ON
1 2 4
DSW4
3
ON
DSW
3
DSW
9
TP
DSW8 2 3 1
ON
ON
1 2
ON
1 6 5 3 4 2
CN28
CN3
3
AB
12
R/L1
S/L2
MP/N
CN201
PCN201
PCN202
CN203
CN202
PCB2
Connector for Fan Motor
PCB1
Connector for Thermistor
Connector for Float Switch
Connector for Expansion Valve
Connector for EconoFresh Kit
Connector for Condensate Pump
NOTE:
During the removal or installation of the parts if the insulation material attached on the cabinet is removed,
then reapply and repair the insulation. Otherwise, condensation may occur when cold air enters.
4.2 Maintenance of Indoor Unit
Use the specified non-flammable refrigerant (R410A) to the outdoor unit in the refrigerant cycle.
Do not charge the unit with materials other than R410A, such as hydrocarbon refrigerants
(propane, etc.), oxygen, flammable gases (acetylene, etc.) or poisonous gases when installing,
maintaining and moving the unit. Contamination of these are extremely dangerous and may
cause an explosion, fire, and injury.