Munters Rotem RBU-27 SE User Manual

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6. Troubleshooting
The following sections detail how to troubleshoot the RBU-27 SE.
o General Issues
o Contactors and Terminals Issues
6.1 General Issues
Table 3 describes the outputs and their related relays. In case there is a problem check the following before
troubleshooting your unit:
o Voltage
o Circuit breakers
o All other connections
After verifying that the above are operating, follow the instructions given in Table 3 .
Table 3: General Troubleshooting Issues
Issue #
Issue Description
Related Relay
1
Inlet open1 power fails
Replace K2
2
Inlet open2 fails
Replace K3
3 Tunnel open power fails Replace K5
4
Fan 1 & 2 fails
Replace K16
5
Fan 3 & 4 fails
Replace K17
6
Fan 5 & 6 fails
Replace K18
7
Fan 7 & 8 fails
Replace K19
8 Fan 9 & 10 fails Replace K20
9
Fan 11 & 12 fails
Replace K21
10
Fan 13 & 14 fails
Replace K22
11
Fan 15 & 16 fails
Replace K23
12
Heater 1 & 2 fails
Replace K24
13 Heater 3 & 4 fails Replace K25
14
Cool Pad 1 & 2 fails
Replace K26
15
Cool Pad 3 & 4 fails
Replace K27
6.2 Contactors and Terminals Issues
Table 4, Table 5, and Table 6 detail troubleshooting issues that concern contactors and terminals. For layout issues, refer
to Figure 14.
6.2.1 Contactor Check and Terminals Example
To check K4, ensure that the inputs/terminals settings are set as follows:
TH1: short
TH2:
open
TH3:
open
TH4:
open
TH5:
open
PP-F:
short
Latch:
off

Munters Rotem RBU-27 SE Specifications

General

Brand	Munters
Model	Rotem RBU-27 SE
Category	Controller
Language	English