Daikin VRV IV RXYQ TYDN Series Engineering Data page 51

Installation Manual
Malfunction code
Main code
Auto charging related
P2
P8
PE
P9
16. Operation of the unit
Once the unit is installed and test operation of outdoor unit and indoor
For operating the indoor unit, the user interface of the indoor unit
should be switched ON. Refer to the indoor unit operation manual for
more details.
17. Maintenance and service
17.1. Maintenance introduction
In order to ensure optimal operation of the unit, a number of checks
and inspections should be carried out on the unit at regular intervals,
preferably yearly.
This maintenance shall be carried out by the installer or service agent.
17.2. Service precautions
DANGER: DO NOT TOUCH PIPING AND ITERNAL PARTS
CAUTION
When performing service to inverter equipment:
1
supply is turned off.
2 Measure the voltage between terminals on the terminal block for
main circuit is less than 50 V DC.
3P362438-1B English
52
Contents
Unusual low pressure on suction line
Freeze-up prevention indoor unit
Close valve A immediately. Push BS3 to reset. Check
following items before retrying autocharge procedure:
Check if the gas side stop valve is opened correctly.
Check if the valve of the refrigerant cylinder is
opened.
Check if the air inlet and outlet of the indoor unit are
not obstructed.
Close valve A immediately. Push BS3 to reset. Retry
autocharge procedure.
Prepare for autocharge stopping.
Finish autocharge mode.
1
RXYQ72T
3
RXYQ96,120T
2
3
1
RXYQ144,168T
2 2
3
1
1 Terminal block for power supply
2 Tester
3 White connector
3 To prevent damaging the printed circuit board, touch a noncoated
metal part to eliminate static electricity before pulling out or plug-
ging in connectors.
4 Pull out junction connectors X1A, X2A (X3A, X4A) for the fan
motors in the outdoor unit before starting service operation on the
inverter equipment. Be careful not to touch the live parts.
(If a fan rotates due to strong wind, it may store electricity in the
capacitor or in the main circuit and cause electric shock.)
5
interface or on the outdoor unit segment display and normal opera-
tion will not be performed.
For details refer to the wiring diagram labelled on the back of the
Pay attention to the fan. It is dangerous to inspect the unit while the
fan is running. Make sure to turn off the main switch and to remove the
fuses from the control circuit located in the outdoor unit.
EDUS341411-N
Solution
2
3
42
3P362438-1B
Installation of Outdoor Units