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Service Menu Parameters
Liebert
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iCOM
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Figure 105 Setpoints screen, page 2 of 9
S113 Enable Temp Compensation—Temperature compensation allows for a second or even a third
sensor to be used that will influence the units cooling or heating. Return compensation can be used
when the supply or remote sensors are being used for control. Then the return sensor is then
monitored to maintain a minimum return temperature.
Supply compensation can be used only when Optimized Aisle is enabled. The supply sensor will not
only be used for controlling cooling capacity but will also monitor the cold aisle temp to ensure that
the cold aisle temperature setpoint is met.
S114 Return Compensation Setpoint—The temperature setpoint where compensation begins to
operate by increasing the supply air setpoint.
S115 Return Compensation Band/Value—The return compensation band / value will determine
how quickly the cooling capacity is adjusted as the return temperature drops below the return
compensation setpoint.
S116 Supply Compensation Value—The Supply Compensation value determines how much the
supply temperature setpoint will be reduced when the units fan speed is at 100% and the cold aisle is
not able to maintain temperature setpoint.
Any modifications to the supply temperature setpoint will be shown at the temperature setpoint on
parameter S103 as the actual active control point.
S118 Comp Cap Filter at 0-100%—Controls the rate of change during comp load changes to avoid
overshoots. The filter value depends on the current control deviation from the setpoint.
On the setpoint (at 0%), it’s typically set lower (slow), and at the end of the P-band (at 100%) it’s
typically set higher (faster). The value is given in % control output change per second.
S119 Capacity Transition Filter—This parameter should only be adjusted by a factory-service
trained technician. The transition capacity filter controls how quickly the capacity changes between
different modes of operation.
This filter helps with the transition to avoid overshoot.
S120 CW Cap Filter at 0 - 100%— The CW Filter at 0% / 100% Controls the rate of change during a
valve position adjustment to avoid overshoots. The filter value depends on the current control
deviation from the setpoint. On the setpoint (at 0%), it’s typically set lower (slow), and at the end of
the P-band (at 100%) it’s typically set higher (faster). The value is given in % control output change
per second.
S121 BMS Backup Temp Setpoint—Selects a temperature setpoint that will be activated in the
event of a BMS Timeout. The BMS timer must be configured for this parameter to activate.
S122 2nd Temperature Setpoint—Selects a temperature setpoint that will be activated in the
event of a customer input signal configured as the second setpoint. The customer input must be
configured for this parameter to activate.
- 2
- TABLE OF CONTENTS 3
- 1.0 INTRODUCTION 11
- 2.1 System Screen 14
- 5Liebert 15
- 2.2 Main Unit Screen 16
- 2.3.2 Accessing Submenus 17
- Display Filtering 19
- 2.3.3 Entering a Password 20
- Figure 14 User menu icons 23
- Table 2 User menu icons 23
- Figure 15 Service menu icons 24
- Table 3 Service menu icons 24
- 3.0 OPERATION 26
- Autorestart 27
- Loss of Power Alarm 27
- Minimum Fan Speed 29
- Operation 30
- Low-Pressure Time Delay 31
- Advanced DX Freeze Protection 31
- Pump Down 32
- High Pressure Alarm 32
- 23 Liebert 33
- Settings 34
- 25 Liebert 35
- 3.2.2 Compressor Control 36
- Compressor Proportional Bands 36
- 27 Liebert 37
- 3.2.3 Chilled Water Control 38
- 29 Liebert 39
- 31 Liebert 41
- Cooling—Free-Cooling 42
- Dual-Cooling Source 42
- DETAIL CDETAIL B 43
- DETAIL D 43
- FRONT VIEW 43
- DETAIL E 44
- 35 Liebert 45
- 3.4 Liebert Air Economizer 46
- Operation 46
- 37 Liebert 47
- 3.4.2 Liebert Air Economizer 48
- System Overview 48
- (Not by 49
- Emerson) 49
- Out of Service 50
- 41 Liebert 51
- 43 Liebert 53
- 3.5.2 SCR Reheat 57
- Tight Mode 57
- 3.6.1 Humidification 59
- Infrared Humidifier 59
- 3.6.2 Dehumidification 60
- Dehumidification Low Limit 60
- . If the proportional 63
- Setting Up PI control 64
- 3.8 Supply Control 66
- 3.9.1 Operation 67
- Temperature Compensation 68
- Racks with Equipment 73
- Figure 59 S190 Limit 75
- Figure 60 S190 Control 75
- 67 Liebert 77
- 3.10.2 User Inputs 80
- and Liebert DS 81
- Air-Cooled Units 81
- 3.10.4 Liebert iCOM-DO 82
- Calculating Unit Wellness 84
- 75 Liebert 85
- 4.0 TEAMWORK 86
- 4.2.2 No Teamwork 87
- 4.2.3 Teamwork Mode 1 87
- 4.2.4 Teamwork Mode 2 88
- Fixed Speed 89
- Variable Speed 89
- Teamwork 90
- 4.2.6 Hardware Setup 91
- 4.3.2 DIP Switch Settings 92
- Unterminated 94
- Terminated 94
- 85 Liebert 95
- Grounded CANbus Cable 97
- 4.3.8 Software Setup 99
- 4.3.9 Standby—Rotation 99
- Standby and Cascade 100
- 91 Liebert 101
- Small Displays 104
- Large Displays 104
- 95 Liebert 105
- Small Graphics Display 106
- Liebert iCOM 107
- I/O Board 107
- Graphics Display 108
- (Rear View) 108
- Optional Large 108
- SITESCAN 110
- 6.1 Terminals 77 and 78 111
- via 77/78 112
- 7.0 USER MENU PARAMETERS 113
- User Menu Parameters 114
- 105 Liebert 115
- 7.2 User-Graphic Menu Screens 116
- Event Log 117
- View Network 117
- 109 Liebert 119
- 111 Liebert 121
- 113 Liebert 123
- Active Alarms 125
- 117 Liebert 127
- 119 Liebert 129
- 121 Liebert 131
- 8.0 SERVICE MENU PARAMETERS 132
- Service Menu Parameters 133
- 123 Liebert 133
- 125 Liebert 135
- 127 Liebert 137
- 129 Liebert 139
- 131 Liebert 141
- 133 Liebert 143
- 135 Liebert 145
- 137 Liebert 147
- 139 Liebert 149
- 141 Liebert 151
- 143 Liebert 153
- 145 Liebert 155
- 147 Liebert 157
- 149 Liebert 159
- Set Alarm Screens, Pages 4-10 160
- 151 Liebert 161
- 153 Liebert 163
- 155 Liebert 165
- 157 Liebert 167
- 159 Liebert 169
- 161 Liebert 171
- 163 Liebert 173
- 165 Liebert 175
- 167 Liebert 177
- 169 Liebert 179
- 171 Liebert 181
- 9.0 MONITORING POINTS 187
- Example of points generated 188
- Monitoring Points 189
- 179 Liebert 189
- Technical Support / Service 192
- Locations 192
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