Airwell DLS 43 DCI, Service Manual

Page: 130 / 182

13-13
TROUBLESHOOTING
SM DLSDCI 3-A.1 GB
13.5 Procedures for checking Main Parts
13.5.1 Discharge DC Voltage
13.5.2 Checking Mains Voltage
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the system is expected. If in range, check the Power (Circuit) Breaker and look for broken or loosed
cable lugs or wiring mistakes.
13.5.3 Checking Line Filter Board
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= ' @ @ Ö both €! and driver .
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13.5.4 Checking Compressor Driver
In normal operation the 7-segments display is ON continuously. Even is that case, there can still be
a Hardware problem that prevents the system to perform well or at all. If no other problem is found,
replace the driver.
Œ
Check power supply to driver connected well and no burn marks on wiring.
Œ
PFC chock is connected well. Correct if needed.
Œ
Check PFC Chock (13.5.4.3). Replace chock if needed.
Œ
Check main fuse (20A). In case fuse is burnt, replace driver.
If all is well but still leds are OFF, Replace driver.
In normal operation the 7-segments display is ON continuously. Even is that case, there can still be
a Hardware problem that prevents the system to perform well or at all. If no other problem is found,
replace the driver.
Œ
Check power supply to driver connected well and no burn marks on wiring.
Œ
PFC chock is connected well. Correct if needed.
Œ
Check PFC Chock (13.5.4.3). Replace chock if needed.
Œ
Check line filter and main fuse (20A). In case fuse is burnt, replace both driver and filter.
If all is well but still leds are OFF, Replace driver.
High voltage!!!
Wait for DC voltage to be discharged before re touching any part of the driver to
avoid electric shock.
Check to ensure that DC voltage has reduced to below 50VDC, if not, keep
waiting until it does.
13.5.4.2 YBD 030
13.5.4.1 YBD 018-024