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
Confirm that the Mains voltage is in range. If Mains voltage is out of this range, abnormal operation of
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
1) Check for any burn signs on the filter board and its coils and relays, replace if any.
2) Check voltage at the inlet and outlet of the line filter. If no output voltage, replace line filter.
3) In case of burnt main fuse in line filter – replace
both
Line filter
and
driver
.
Replacing line filter - (
14.1.16
)
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.
Check power supply to driver connected well and no burn marks on wiring.
PFC chock is connected well. Correct if needed.
Check PFC Chock (13.5.4.3). Replace chock if needed.
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.
Check power supply to driver connected well and no burn marks on wiring.
PFC chock is connected well. Correct if needed.
Check PFC Chock (13.5.4.3). Replace chock if needed.
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.
TROUBLESHOOTING
Service Manual
Multi Trio-72/Quattro-80 DCI
13-28
Revision 0
13.5
Procedures for checking Main Parts
13.5.1
Discharge DC Voltage
13.5.2
Checking Mains Voltage
Confirm that the Mains voltage is between 198 and 253 VAC. If Mains voltage is out of this range,
abnormal operation of 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
1) Check for any burn signs on the filter board and its coils and relays, replace if any.
2) Check voltage at the inlet and outlet of the line filter. If no output voltage, replace line filter.
Replacing line filter - (
14.1.19
)
13.5.4
Checking Inrush Circuitry
1) Check continuity of each wire on the inrush wiring cable – repair if needed.
2) Power ON the unit, check voltage between both of the inrush pins on the ODU main board –
should be 0 at first and 12VDC after 1 minute. A click sound should also occur after 1 minute. If
no voltage – replace ODU main Board.
3) While power is off check resistance between line input and line output in the filter board –
should be 200
Ω
. Turn on the power and check again, after 1 minute (after the click should be
0
Ω
. If not, the resistor is burned - replace Line filter.
4) Disconnect the inrush connector (red) from the controller and Connect 9V battery to pins 1 and
3 (Non-polarity). A click sound should occure. If not, the relay is burned - replace Line filter.
2)
Inrush connector pin check
3)
Inrush resistor check
4)
Inrush connector pin check
Replacing line filter - (
14.1.19
)
Replacing main board - (
14.1.13
)
13.5.5
Checking Compressor Driver
Remove all the terminals of the driver before checking.
If items
1)
to
11)
are performed and the results are satisfactory, driver is normal.
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
