Table of contents
1 EMS controller reference guide 4
1.1 About this reference guide 4
2 Water ingress – advisory information for FMEA analysis 5
3 What is an ems75sz (sub-zero)? 6
3.1 Control Display Module (CDM) 6
3.2 Power Supply Module (PSM) 7
3.3 ems75sz user interface 7
3.3.1 Push buttons: 8
3.3.2 LED indicators: 8
3.4 ems75sz relay ratings 8
3.5 Temperature input ranges 9
3.6 ems75sz wiring diagram 9
3.7 Power supply module 10
3.8 Power supply module – electrical connections 11
3.9 How to mount the power supply module 11
3.9.1 Power supply module dimensions 12
3.10 Control display module 13
3.11 How to mount the control display module 15
3.12 External control display module – electrical connections 16
3.13 Internal control display module – electrical connections 17
3.14 Environmental ratings 17
4 User guide 18
4.1 Power-up sequence 18
4.2 Function buttons - ems sub zero 18
4.3 Indicators 19
4.4 Display codes 19
4.5 What are the menus? 20
4.6 How to access the menu EMS controllers 21
4.7 How to view the ems75sz parameter settings (PS) 21
4.8 How to run the test routine (tst) 23
4.8.1 The relay test 24
4.8.2 The heater relay test 25
4.8.3 The analogue input test 26
4.8.4 The motion sensor test 26
4.9 How to view the last three alarms (FLt) 27
4.10 Passwords 28
4.11 How to perform a half reset (Hr) 29
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27 February 2014
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