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Components
Service manual
272
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
8
Measure the resistance between the pins 1‑2 of the high pressure switch
connector.
Result:
The switch MUST be open.
9
Lower the pressure of the nitrogen in the refrigerant circuit just below reset
pressure of the high pressure switch.
10
Measure the resistance between the pins 1‑2 of the high pressure switch
connector.
Result:
The switch MUST be closed.
High pressure switch connector
measurements are correct?
Then
Yes
High pressure switch is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
No
Replace the high pressure switch, see
272].
3.9.2 Repair procedures
To remove the high pressure switch
Prerequisite:
Stop the unit operation via the central controller.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
315].
Prerequisite:
Recuperate the refrigerant from the refrigerant circuit, see
368].
1
If needed, remove any parts to create more space for the removal of the high
pressure switch.
2
Disconnect the high pressure switch connector from the PCB.
a
b
c
c
d
d
e
a
High pressure switch
b
High pressure switch pipe
c
Screw
d
Clamp
e
Plate
3
Remove the screws, the clamps and the plate.
4
Cut all tie straps that fix the high pressure switch harness.
5
Cut the high pressure switch pipe using a pipe cutter.
Summary of Contents for VRV IV+
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