SMC Networks HEC002-A5, Operation Manual

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Safety Instructions
HEC002-A/HEC006-A 2-5
2.3.1 Interlock list
Table2-3 Safety interlock list (Part 1)
No. Description Part Quantity Location Cause
1
Overheat in
Heat
Exchanger
Thermostat
1 Heat
Exchanger
Detects abnormal heat in heat
exchanger.
2
Switching
power supply
failure
Thermostat
2 Power supply
Detects abnormal current, voltage or
heat.
3
Overheat in
Heat Sink
Thermostat
1 Heat sink
Detects overheat in Heat Sink.
4
Low circulating
fluid level
Level sensor
1 Reservoir Detects lowering of circulating fluid level
in reservoir.
5
Detection of
breakage of
temp. sensor
Controller
internal circuit
-
Detects breakage and short circuit of
temp. sensor and cables.
6
Excessive
temp. increase Controller
internal circuit - Detects temp. input value not less than
70

C.
7
Excessive
temp.
decrease
Controller
internal circuit
-
Detects temp. input value not more than
0

C.
8
Abnormal
output
(Overload)
Controller
internal circuit
- Works when temp. change is smaller
than over load detection temp.(selected
between 0.1 to 9.9

C) even if 100%
output continues during overload
detection time (selected between 0 to
99min.) When 0 is set, the alarm doesn’t
arise.
9
Low flow rate
(Option)
Flow sensor
-
Detects lowering of flow rate at
0.7±0.3L/min or less.
Table2-4 Safety interlock list (Part 2)
No. Description Condition of unit Indication How to reset
1
Overheat in Heat
Exchanger
Shuts off power supply to
the Heat exchanger, Pump
and Fan.
Error indication on display.
(ERR14)
Restart power
supply
2
Switching power
supply failure
Shuts off power supply to
the Heat exchanger, Pump
and Fan.
Error indication on display.
(ERR11) Restart power
supply
3
Overheat in Heat
Sink
Shuts off power supply to
the Heat exchanger, Pump
and Fan.
Error indication on display.
(ERR14)
Restart power
supply
4
Low circulating fluid
level
Shuts off power supply to
the Heat exchanger, Pump
and Fan.
Error indication on display.
(ERR20)
Restart power
supply