Daikin VRV IV+ Service Manual page 247

Problem solved?
Repair procedures
To remove the expansion valve motor
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Phase
Ф1
Ф2
Ф3
Ф4
▪ Opening sequence for Y2E andY5E:
Valve closing: 8 > 7 > 6 > 5 > 4 > 3 > 2 > 1
Valve opening: 1 > 2 > 3 > 4 > 5 > 6 > 7 > 8
Phase
1 2
Ф1 ON ON
Ф2 OFF ON
Ф3 OFF OFF
Ф4 OFF OFF
7 Check if the expansion valve is open. Check with a contact thermometer (or by
touching) if refrigerant flows through the expansion valve.
Is the expansion valve open?
Yes
No
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 If needed, remove any parts or insulation to create more space for the
removal.
2 Cut the tie strap and remove the insulation cap.
Energizing status
1 2
ON OFF
ON ON
OFF ON
OFF OFF
Energizing status
3 4
OFF OFF
ON ON
OFF ON
OFF OFF
Action
Component is OK. Return to the
troubleshooting of the specific error
and continue with the next step.
Replace the expansion valve, see
"Repair
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
3 Components
|
3
OFF
OFF
ON
ON
5 6 7
OFF OFF OFF
OFF OFF OFF
ON ON OFF
OFF ON ON
4
procedures" [ 247].
4
"3.15 Plate work" [ 315].
4
ON
OFF
OFF
ON
8
ON
OFF
OFF
ON
Service manual
247