Repair Procedures - Daikin Sky Air Advance RZA200D7Y1B Service Manual

3 | Components

3.8.2 Repair procedures

To remove the low pressure switch
Service manual
92
4 Measure contacts between the pins 1‑2 of the low pressure switch connector.
Result: The switch MUST be closed.
5 Vacuum until pressurized just below operating pressure of the low pressure
switch.
6 Measure again contacts between the pins 1‑2 of the low pressure switch
connector.
Result: The switch MUST be open.
INFORMATION
If the low pressure switch was triggered open, it will stay open until the refrigerant
pressure rises above the reset pressure of the low pressure switch.
7 Fill the refrigerant circuit with nitrogen until pressurized just below reset
pressure of the low pressure switch.
8 Measure again contacts between the pins 1‑2 of the low pressure switch
connector.
Result: The switch MUST be open.
9 Fill the refrigerant circuit with nitrogen until pressurized just above reset
pressure of the low pressure switch.
10 Measure again contacts between the pins 1‑2 of the low pressure switch
connector.
Result: The switch MUST be closed.
Low pressure switch connector
measurements are correct?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see
"4.2.2 Repair procedures" [
1 If needed, remove any parts to create more space for the removal of the low
pressure switch.
2 Remove the screws and remove the brackets and clip from the low pressure
switch and pipe.
Then
Low pressure switch is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
Replace the low pressure switch, see
"3.8.2 Repair
4
142].
4
procedures" [ 92].
4
"3.12 Plate work" [ 111].
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05