Daikin VRV-WIII RWEYQ72PTJU Service Manual page 136

Field Setting from Condensing Unit
3.7.7 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 judgement of piping length, refrigerant overcharging, and learning for the minimum opening degree of
electronic expansion 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
3.7.8 Power Transistor Check Operation
When the inverter system errors (error of inverter, INV. compressor), to locate where the error occurs, switching to the
power transistor check mode of inverter in the service mode setting enables not to judge the position detection signal error
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.
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 PCB is normal.
For details, refer to "Power Transistor Check" on P.244.
128
Press the TEST button for 5 seconds.
10 seconds to 10 minutes
3~5 minutes
10 minutes
• Stop valve close check
• Wrong wiring check
• Refrigerant over change check
• Piping length check
3 minutes
10 seconds ~ 5 minutes
5 minutes
k:
LED display (H1P~H7P) (
: Normal completion
: Abnormal completion
SiUS30-1301
h: l:
ON OFF Blink)
Note:
Field Setting