Daikin Perfera RXM R Series Service Manual page 67

RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
b
a
a Compressor thermal protector
b Faston connector
c Bracket
3 If in doubt, measure the temperature of the compressor thermal protection.
Result: The temperature MUST be below 85°C.
4 Disconnect the Faston connectors from the compressor thermal protection.
INFORMATION
Make sure that the wiring between the compressor thermal protector connector and
the connector on the PCB is properly connected and NOT damaged (check
continuity), see
5 Using a hot air gun, carefully heat the compressor thermal protection to
slightly above 123°C for Class 20~60 units or 133°C for Class 71 units
(compressor thermal protection trips at 117~123°C for Class 20~60 units and
127~133°C for Class 71 units).
6 Disconnect the compressor thermal protector from the intermediate
connector and measure the resistance between pins 1‑2.
Result: The contact MUST be open (measured resistance = OL).
7 Let the compressor thermal protection cool down below 85°C (reset
temperature is 85~105°C).
8 Again measure the resistance between the pins 1‑2 of the connector of the
compressor thermal protector.
Result: The contact MUST be closed (measured resistance = 0 Ω).
Does the compressor thermal protector
contact open and close at the correct
temperature?
Yes
No
c
4
"6.2 Wiring diagram" [ 223].
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Replace the compressor thermal
protector, see
procedures" [
3 Components
|
"Repair
4
68].
Service manual
67