Daikin RWEYQ28PY1 [159/342] Emergency operation

Daikin RWEYQ30PY1 [159/342] Emergency operation
Field Setting Si30-813
148 Test Operation
3.2.9 Power Transistor Check Operation
When the inverter system malfunctions (malfunction of inverter, INV compressor), to locate
where the malfunction occurs, switching to the power transistor check mode of inverter in the
service mode setting enables not to judge the position detection signal malfunction but to output
waveform only during inverter operation. (The waveform can be checked by disconnecting the
wiring of compressor.)
After the completion of checks, return the system to the previous mode and wait for 30 seconds
or more until the discharge of capacitor is completed. Then, conduct a subsequent work.
Notes: Be sure to disconnect the compressor wiring when conducting the check operation mentioned
above.
When the output voltage is approx. 100~200 V (10 Hz) and the voltage balance between
phases U-V, V-W, W-U is within ±5%, the inverter PC board is normal.
Refer the detail power transistor check to page 313.
3.2.10 Emergency Operation
If the compressor cannot operate, this control inhibits any applicable compressor or outside unit
from operating to perform emergency operation only with the operative compressor or outside
unit.
3.2.11 Restrictions for Emergency Operation
• If the emergency operation is set while the outside unit is in operation, the outside unit stops
once after pump-down residual operation (a maximum of 5 minutes elapsed).
3.2.12 In the Case of Multi-Outside-Unit System
Automatic backup operation
With multi-outside-unit system, if a certain outside unit system malfunctions (i.e., the system
stops and indoor unit remote controller displays the malfunction), by resetting the system with
the indoor unit remote controller, the applicable outdoor unit is inhibited from operating for 8
hours, thus making it possible to perform emergency operation automatically.
However, in the event any of the following malfunctions occurs, automatic backup operation
can be performed.
Malfunctions under which automatic backup operation can be performed:
E3, E4, E5, E7
•F3
J3, J5, J6, J7, J9, JA, JC
• L4, L5, L8, L9, LC
•U2, UJ
Caution
"For making a compressor unable to operate due to malfunction, etc., be sure to
conduct the work with emergency operation setting.
Never execute work such as disconnection of the power cable from magnet contactor.
(Otherwise, other normal compressors may malfunction.)
Because the units will be operated in the combination with which oil pressure
equalization between compressors cannot be performed.

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