Unit installation

CDU Installation Guide Page 19
Cooling Distribution Unit
COMMISSIONING (continued)
5.6 Inverter Setup
The inverter drive has a separate display and
keypad as detailed on the left. The display is set as
standard to show the frequency output to the pump
motors, but repeated pressing of the key with the
circular arrow, will also show also the frequency
reference value and current drawn by the pump.
There are 79 adjustable parameters within the
inverter that have been factory preset to the values
shown in the table below (for full information on
each parameter, refer to the inverter drive guide).
Parameter n01, when set to 0, locks parameters
n02 to n79 (set n01 to 1 for adjustment) –
parameters can only be changed when in the
PRGM mode and the inverter is not operational.
The Run, Stop/Reset keys and the frequency
setting potentiometer are for manual operation only
and have been disabled in the setup.
If the inverter goes to a fault condition the red alarm
LED will blink on and off and an alarm code will
show in the inverter display window (refer to inverter
guide for full details).
Parameter n78 will display a fault code if the inverter goes into a fault condition. This information will be
required by the CDU manufacturer for fault diagnosis.
Parameter
Setting
n01
0
n02
1
n03
2
n04
0
n05
1
n06
1
n07
0
n08
0
n09
60.0
n10
400/208
n11
50.0
n12
1.5
n13
24/12
n14
1.5
n15
24/12
n16
10.0
n17
10.0
n18
10.0
n19
10.0
n20
0
Parameter
Setting
n21
6.0
n22
0.0
n23
0.0
n24
0.0
n25
0.0
n26
0.0
n27
0.0
n28
0.0
n29
6.0
n30
100
n31
0
n32
6.3*/10.8
n33
0
n34
8
n35
0
n36
2
n37
5
n38
3
n39
6
n40
13
Parameter
Setting
n41
100
n42
0
n43
0.10
n44
0
n45
1.00
n46
3
n47
2
n48
0
n49
0.0
n50
0.0
n51
0.0
n52
50
n53
0.5
n54
0.0
n55
0
n56
170
n57
160
n58
0.0
n59
0
n60
160
Parameter
Setting
n61
0.1
n62
0
n63
1.0
n64
3.2
n65
33
n66
0.0
n67
2.0
n68
0
n69
0
n70
0
n71
2
n72
0
n73
10
n74
0
n75
0
n76
RDY
n77
0
n78
---
n79
020
Note: Alternative settings for CDU121 & 151 (208-230v operation) are shown in Blue.
* This setting (6.3A) is for 380-415 volts, for 460-480 volts change to 5.7A (refer to wiring diagram).