User's Manual
MS3705HB Slim Plug-In Digital Alarm Setter with Isolated Dual Output (High Accuracy Model)
Rev. 1.50
5
12. LED Status Indicator
The MS3705HB has LED indicators to indicate its status. The
following table shows indicator patterns.
No Event
Relay Trip
Point
Indicator
CPU Status Indicator
Relay
Recovery
Operation
1
Power ON or
switch
operation
Blinks 3 times
(1s ON - 0.5s
OFF cycle).
Green LED turns ON
for 1 second, and then
red LED turns ON for
0.5 second. This cycle
is repeated 3 times.
Normal
operation
–
2
Normal
operation
OFF
Green LED is ON.
Normal
operation
–
3
Trip Point
setting
Set value
Green LED is ON.
Normal
operation
–
4
Hysteresis /
Mode setting
Set value
Green LED blinks at 1
second intervals.
Deactivated
–
5
Data error in
Relay Trip
Point setting
02
Red LED blinks at 1
second intervals.
Deactivated Reconfig-
uration
6
Data error in
Relay Start-up
Limitation
04
Red LED blinks at 1
second intervals.
Deactivated Reconfig-
uration
7
Data error of a
compensated
value
08
Red LED blinks at 1
second intervals.
Deactivated None
8
Data error in
Hysteresis
Setting
16
Red LED blinks at 1
second intervals.
Deactivated Reconfig-
uration
9
Data error in
Relay
Activation
Mode Setting
32
Red LED blinks at 1
second intervals.
Deactivated Reconfig-
uration
10
System error
Not defined.
Red LED is ON; Green
LED is not defined.
Deactivated None
Notes:
#1: When the Relay Trip Point Indicator is turned on, a 3-digit number “888” with dots is displayed.
#5-9: Only the last 2 digits are displayed in the event of an error.
#10: The red LED may fail to light up. The relay operation may sometimes be unstable.
13. Maintenance and Inspection
Check the unit for proper characteristics and settings about once
every two years.
14. Warranty Period and Scope
[Warranty Period]
MTT’s hardware products are warranted for a period of seven (7)
years from the date of shipment.
[Warranty Scope]
1) MTT warrants that its hardware products are free from defects
in materials and workmanship and conform to its product
specifications.
2) MTT ships the products under its appropriate quality
management system and quality control, but does not warrant,
expressed or implied, that the operation, output, or indication
of the hardware will be uninterrupted or error free. MTT shall
not be liable and make no warranty for any damage to or any
safety or performance trouble in the customer’s or any other
third party’s equipment if the operation, output, or indication is
interrupted or faulty.
3) If, during the warranty period, the product proves to be
defective when used in accordance with the relevant user’s
manual, the product will be repaired or replaced.
4) This warranty does not apply to any malfunction or failure
resulting from the following:
a. Improper or incomplete maintenance or calibration,
b. Any other cause, which does not relate with the delivered
product,
c. Modification or repair by any person other than MTT, and
d. Natural disasters or other unavoidable accidents, for which
MTT is not liable.
