ESIE16-03B
|
Part 2. Troubleshooting
2.4. Component checklist
Page 48
22/08/16
|
Version 1.1
SA R32 Sky-Air RZAG-L
5. Measure the voltage on 4-way valve connector: pin 1-3. If the measured voltage does not range 220-240 VAC during switching
/ 15 VAC after switching, unplug 4-way valve connector from PCB and measure the voltage directly on the PCB: pin 1-3 of
4-way valve connection.
-
If the voltage, measured directly on the PCB does not range 220-240 VAC during switching / 15 VAC after switching,
replace main PCB.
-
If the voltage, measured directly on the PCB does range 220-240 VAC during switching / 15 VAC after switching, replace
the 4-way valve coil (refer to
"Replacing 4-way valve coil" on page 75
).
6. Unplug 4-way valve connector from PCB and measure the resistance of the 4-way valve coil. If the measured resistance does
not range 1000 - 2000
Ω
, replace the 4-way valve coil (refer to
"Replacing 4-way valve coil" on page 75
).
7. Switch on the Daikin unit, start cooling/defrost operation.
If the temperature after the plate type heat exchanger rises, the control of the 4-way valve is wrong. Replace main PCB.
1. Switch off Daikin unit via the user interface.
2. Switch off Daikin unit with the field supplied circuit breaker.
3. Slide a magnet over the front and the rear of the 4-way valve body and sense the attraction of the magnet to determine the
valve position.
4. If the magnet is attracted in positions A,A’ or B,B’, the 4-way valve is OK; if the magnet is attracted in positions C,C’ the 4-way
valve must be replaced (refer to
"Replacing 4-way valve body" on page 73
).
W
ARNING
: R
ISK
OF
F
IRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of
the PCB.
W
ARNING
: R
ISK
OF
F
IRE
When reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins of
the PCB.
Determine the position of the 4-way valve
A
A’
B
B’
C
C’
