
Micha Solar
MSRx Charge Controller
User Operation Manual
Page 41 of 46
Document: 802440-30.doc
Date: December 2020
www.micha.co.uk
Sub Menu N Notes:
6.15.1. High Load Voltage 1 Alarm
To enable the High Load Voltage 1 Alarm: Load Voltage selection on Menu B Screen 3 must
include Load Voltage 1, and High Load Voltage 1 Alarm, Menu N Screen 0 must be set to
Enable.
Alarm Operation:
If Load Voltage 1 is greater than or equal to the High Load Voltage 1 Alarm Set Voltage for the
High Load Voltage 1 Alarm Delay time, then the High Load Voltage 1 Alarm will be activated. If
Load Voltage 1 is less than or equal to the High Load Voltage 1 Alarm Reset Voltage then the
High Load Voltage 1 Alarm will be de-activated.
6.15.2. Low Load Voltage 1 Alarm
To enable the Low Load Voltage 1 Alarm: Load Voltage selection on Menu B Screen 3 must
include Load Voltage 1, and Low Load Voltage 1 Alarm, Menu N Screen 4 must be set to Enable.
Alarm Operation:
If Load Voltage 1 is less than or equal to the Low Load Voltage 1 Alarm Set Voltage for the Low
Load Voltage 1 Alarm Delay time, then the Low Load Voltage 1 Alarm will be activated. If Load
Voltage 1 is greater than or equal to the Low Load Voltage 1 Alarm Reset Voltage then the Low
Load Voltage 1 Alarm will be de-activated.
6.15.3. High Load Voltage 2 Alarm
To enable the High Load Voltage 2 Alarm: Load Voltage selection on Menu B Screen 3 must
include Load Voltage 2, and High Load Voltage 1 Alarm, Menu N Screen 8 must be set to
Enable.
Alarm Operation:
If Load Voltage 2 is greater than or equal to the High Load Voltage 2 Alarm Set Voltage for the
High Load Voltage 2 Alarm Delay time, then the High Load Voltage 2 Alarm will be activated. If
Load Voltage 2 is less than or equal to the High Load Voltage 2 Alarm Reset Voltage then the
High Load Voltage 2 Alarm will be de-activated.
6.15.4. Low Load Voltage 2 Alarm
To enable the Low Load Voltage 2 Alarm: Load Voltage selection on Menu B Screen 3 must
include Load Voltage 2, and Low Load Voltage 1 Alarm, Menu N Screen 12 must be set to
Enable.
Alarm Operation:
If Load Voltage 2 is less than or equal to the Low Load Voltage 2 Alarm Set Voltage for the Low
Load Voltage 2 Alarm Delay time, then the Low Load Voltage 2 Alarm will be activated. If Load
Voltage 2 is greater than or equal to the Low Load Voltage 2 Alarm Reset Voltage then the Low
Load Voltage 2 Alarm will be de-activated.
6.15.5. Notes:
Any of the Programmable Alarm Relays may be programmed to activate on any of the High &
Low Load Voltage 1 & 2 Alarms. See Sections 5.4, 6.9, and 4.2.1.
If Load 1 & Load 2 are set to be connected in parallel for a higher current rating, then Load 1 will
be in control and only High & Low Load Voltage 1 Alarms will be available. This option is
controlled by Menu B Screen 5: “LC1 & LC2 = Same” – see section 5.3