Repair Procedures - Daikin altherma 3 M Service Manual

3 | Components

3.13.2 Repair procedures

To remove the low pressure switch
Service manual
168
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.
b
a
a Screw
b Bracket
c Clip
3 Disconnect the low pressure switch connector from the appropriate PCB.
4 Cut all tie straps that fix the low pressure switch harness.
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
"3.13.2 Repair
4
291].
b a
c
procedures" [ 4 168].
4
"3.17 Plate work" [ 230].
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03