Fan Tests - Danfoss VLT FC Series Service Manual

Test Procedures
Scaling resistance
measured in Ω
4.0
3.2
3.2
2.7
5.6
5.6
3.2
2.7
2.7
5.6
5.6
Table 8.13 Scaling Resistance, Parallel Drive Systems,
12-pulse, 525–690 V
Scaling resistance
measured in Ω
8 8
2.7
2.5
2.3
2.0
1.8
Table 8.14 Scaling Resistance, E1h–E4H Units, 380–500 V
Scaling resistance
measured in Ω
4.0
3.8
3.1
2.7
2.5
2.1
Table 8.15 Scaling Resistance, E1h–E4h Units, 525–690 V

8.5.13 Fan Tests

All fan tests can be performed with the unit powered from
the AC mains or with the power card powered in split bus
mode. Any time a fan is commanded to start, the control
card checks the fan feedback signal. If the feedback is
missing, the drive issues an alarm or warning based on
which fan feedback is missing.
In E-sized drives, there are parameters that show the speed
feedback for each fan. Fan speed differences of less than
200 RPM are meaningless.
116
®
VLT
Model Drive modules
FC 102, FC 103, FC 302
and FC 202
N315 N250 2-module system
N400 N315 2-module system
N450 N355 2-module system
N500 N400 2-module system
N560 N500 2-module system
N630 N560 2-module system
N710 N630 4-module system
N800 N710 4-module system
N900 N800 4-module system
N1M0 N900 4-module system
N1M2 N1M0 4-module system
Model
FC 102, FC 103, and FC 302
FC 202
N355 N315
N400 N355
N450 N400
N500 N450
N560 N500
Model
FC 102, FC 103, and FC 302
FC 202
N450 N355
N500 N400
N560 N500
N630 N560
N710 N630
N800 N710
Danfoss A/S © 02/2019 All rights reserved.
FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
•
Parameter 43-13 PC Fan A Speed for input plate
mixing fan.
•
Parameter 43-14 PC Fan B Speed for left input
plate mixing fan or power card mixing fan.
•
Parameter 43-20 FPC Fan A Speed for left heat sink
fan.
•
Parameter 43-21 FPC Fan B Speed for the middle
heat sink fan.
•
Parameter 43-22 FPC Fan C Speed for the right
heat sink fan.
•
Parameter 43-24 FPC Fan E Speed for LCP side door
fan.
•
Parameter 43-25 FPC Fan F Speed for lock side
door fan.
NOTICE
POWER REQUIREMENTS
The split bus power supply must have sufficient power
when testing E1h–E4h drives. Fan load in E-sized drives
is >700 W.
Mixing fan
In D-sized drives, the mixing fan operates any time the
drive is powered up. If the drive is powered and the
mixing fan is not running, replace the mixing fan.
In E-sized drives, the operation of the mixing fan is
controlled and only runs when commanded.
Heat sink and door/top fans
Parameter 14-52 Fan Control can be used to command the
fans to run at 100% speed.
1. Use parameter 14-52 Fan Control to command the
fans to run at 100% speed.
2. Confirm that the heat sink fan is running by
checking for airflow through the back channel of
the drive.
3. Confirm that the door/top fan is running by
checking for airflow around the fan.
The 2 fans accelerate at different rates and can take several
seconds, but both operate at 100% speed.
Incorrect reading
If neither fan is running, the most likely cause is that the
fan control circuit on the power card (or fan power card in
E-sized drives) is faulty. Replace the power card or fan
power card. If only 1 fan is running, the most likely cause
is that the other fan is faulty. Replace the failed fan.
MG94A502