Daikin Stylish Series - Page 55

2 | Components
Service manual
55
(C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A +
RXA20~35A + RXA42+50B
Split Stylish R32
ESIE18-03C – 2020.02
2 Slide the expansion valve magnet over the expansion valve body and gently
rotate the magnet clockwise/counterclockwise to manually close/open the
expansion valve.
Does the expansion valve open? Action
Yes Perform an electrical check of the
expansion valve, see "2.3.1Checking
procedures"[454].
No Replace the expansion valve body, see
"2.3.2Repair procedures"[456].
To perform an electrical check of the expansion valve
1 First perform a mechanical check of the expansion valve, see "2.3.1Checking
procedures"[454].
2 Disconnect the electrical connector of the expansion valve coil from the
appropriate PCB and measure the resistance of all windings (between the pins
of each phase (wire) and the common wire) using a multi meter. All
measurements MUST be approximately the same.
INFORMATION
Below is an example of the resistance measurements in which the common wire is
connected to pin 6 of the expansion valve motor connector. Connections may differ
according to the type of expansion valve.
▪ Connector pin 1‑6,
▪ Connector pin 2‑6,
▪ Connector pin 3‑6,
▪ Connector pin 4‑6.
a
a Connector
Is the measured resistance correct? Action
Yes Perform an operation check of the
expansion valve, see "2.3.1Checking
procedures"[454].
No Replace the expansion valve coil,
"2.3.2Repair procedures"[456].
To perform an operation check of the expansion valve
Prerequisite: First perform an electrical check of the expansion valve, see
"2.3.1Checking procedures"[454].
1 Turn ON the power of the unit.