Daikin R410As Service Manual page 150

Si39-302
3.2.6 Setting of Vacuuming Mode
In order to perform vacuuming operation at site, fully open the expansion valves of indoor and
outdoor units to turn on some solenoid valves.
[Operating procedure]
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3.2.7 Check Operation
To prevent any trouble in the period of installation at site, the system is provided with a test
operation mode enabling check for incorrect wiring, stop valve left in closed, coming out (or
misplacing with suction pipe thermistor) of discharge pipe thermistor and judgment of piping
length, refrigerant overcharging, and learning for the minimum opening degree of motorized valve.
CHECK OPERATION FUNCTION
Unit stopping
Step 1
Pressure equalizing
Step 2 Cooling start control
Step 3 Stability waiting operation
Step4~6
Judgement function
Step 7 Pump down residual operation
Step 8 Standby for restarting
Completion
3.2.8 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.)
Note: Be sure to disconnect the compressor wiring when conducting the check operation mentioned
above.
When the output voltage is approx. 50 V (10 Hz) and the voltage balance between phases U-V,
V-W, W-U is within ±5%, the inverter PCB is normal.
Test Operation
With Setting Mode 2 while the unit stops, set (B) Refrigerant recovery / Vacuuming mode to
ON. The expansion valves of indoor and outdoor units fully open and some of solenoid
valves open.
(H2P blinks to indicate the test operation, and the remote controller displays "Test
Operation" and "In Centralized control", thus prohibiting operation.)
After setting, do not cancel "Setting Mode 2" until completion of Vacuuming operation.
Use the vacuum pump to perform vacuuming operation.
Press Mode button "BS1" once and reset "Setting Mode 2".
Press the TEST button for 5 seconds.
10 sec to 10 minutes
20 sec to 2 minutes
10 minutes
• Stop valve close check
• Wrong wiring check
• Refrigerant over change check
• Piping length check
3 minutes
5 minutes
5 minutes
LED display (H1P~H7P) ( 8:
3383333
3933338
3933383
3933388
3933833
3933838
3933883
3933888
3938333
Field Setting
ON 9: BLINKING 3: OFF)
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