MovinCool CM12 Service Manual - Manual (Page 37)

Repair Section
37
7.2 Alarm
• An alarm is emitted when a system abnormality is detected, stopping the system. The type of
abnormality can be recognized by the alarm pattern.
• The CM 12 controller is equipped with a warning signal output-type relay (Form-C, normally
open dry contact), which can be used for monitoring the CM 12 abnormality conditions. The relay
contactor is closed when the following conditions have occurred:
- Temperature sensor failure
- Condensation overflow
- Cooling function failure
• The relay output is rated for 5 A at 30 VDC or 5 A at 250 VAC (resistive load). The relay can be
used to connect to warning devices with compatible outputs such as alarm speakers, light
indicators, etc.
< NOTE >
However,when dipswitch no. 4 on the relay board is OFF, an alarm will not sound.
I002772
ON
ON
OFF
Pattern 1
(Internal thermister failure)
Pattern 2
(Pump or drain problem)
Pattern 3
(Refrigeration system problem)
Pattern 4
(Fire alarm signal input)
0.5sec
0.5sec
0.5sec
4sec
4sec
1sec
ON
OFF
ON
OFF