Johnson Controls YVAHP0721CW Series, Service Manual

Page: 320 / 416

4-36
SM-16007
MAINTENANCE
4.1.16.1 Removing High Pressure Switch (PSH1, PSH2)
(1) Recover refrigerant into proper refrigerant recovery cylinder.
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(3) Remove the high pressure switch from the unbrazing segment of the discharge pipe using a torch.
NOTES:
1. When the high pressure switch is removed, do not expose the refrigerant cycle to the environment
for a long period in order to avoid introduction of foreign particles and moisture to system. Install
a replacement high pressure switch immediately after removing. If it is not possible to do this
immediately, seal the hole with tape.
2. Check that the RC cover inner side (aluminum sheet) does not come in contact with the terminals
of the high pressure switch.
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If the terminals of the high pressure switch are exposed and come in contact with the RC cover,
the electrical components may be damaged.
TURN OFF all power source switches.
4.1.16.2 Removing High Pressure Sensor (Pd) and Low Pressure Sensor (Ps)
(1) Remove the connector for the pressure sensor wiring from PCB1.
NOTE:
First, remove the connector or the wiring can be damaged.
(2) Remove the refrigerant piping for the high
pressure sensor or low pressure sensor using
two wrenches.
Tool
Torch, Adjustable Wrench, Phillips
Screwdriver, Pliers
Tool
Adjustable Wrench, Phillips Screwdriver,
Pliers
Faston Terminal
High Pressure Switch
Unbrazing Segment
Discharge Pipe
Compressor
Wire twisting should be
within 3 winds.
Using Two Wrenches
This part should be sealed with tapes.
DO NOT apply wrenches to this part.
Tightening Torque: 11.1 lbf
G
ft (15N
G
m)
Tightening Position ( )
Wrench Size: 9/16 inch (14mm)
Tightening Position ( )
Wrench Size: 21/32 inch (17mm)