CMS100
Product Manual, Issue 8
www.nexo.com
Page 37
If set point is achieved within twenty (20) cycles the controller reverts to
normal operation. If DIS parameter is set to 0 the controller alternately
displays: d0/USE.
An audio alarm sounds for ten (10) seconds, every ten (10) minutes.
/
If in Saving mode and set point is achieved within twenty (20) cycles
the controller reverts to normal operation and alternately displays:
d0/3Bars.
An audio alarm sounds for ten (10) seconds, every ten (10) minutes.
/
If set point is not achieved within twenty (20) cycles the compressor
switches off and the controller displays 3BarStack: An audio alarm
sounds continuously.
4.4
Temperature sensor alarms
Elstat controllers manage sensor failures as follows:
`
PF1 alarms: The controller will enter PF1 limp home mode.
`
PF2 alarms: The controller will continue running the compressor. The display alternates
between PF2 and the appliance sensor temperature indicating a fault.
Note: Sensor faults may also be identified by using the input test within the test routines (tSt).
4.5
Appliance sensor alarms
The limp home aspect of this alarm ensures that the cooler continues to operate with limited disruption to
the end user. The cooler will operate, cooling the products, while a service engineer visit is scheduled. The
table below describes how the CMS100 Nexo controls the cooler during this time and what the end user
will see:
Audio alarm
Display
Audible alarm sounds five times every compressor cycle (compressor switches ON or
OFF) - if the buzzer is enabled.
While the controller displays the above, the controller is managing the compressor and the fans:
`
The compressor cycles fifteen (15) minutes off, then five (5) minutes on.
`
The fan switches on with the compressor on cycle, then cycles when the compressor is in the
off cycle as set by the FCO (fan cycle on) and FCF (fan cycle off) parameters.
The controller will reboot when the PF1 fault is cleared or fixed.
