Alarms And Safety Functions; Operation After Power Failure - Sanyo MIR-162 Service Manual

ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in table below, and also self diagnostic functions.

Alarms and safety functions

Alarm &
Safety
Automatic set If the internal temperature
temperature deviates from the set temp.
Alarm by +/-2.5
Key lock When the key lock switch is
switch turned ON.
Temperature
If the temperature sensor goes
sensor
open circuit.
abnormality
If the triac goes open circuit.
Triac
abnormality
If the triac goes short circuit.
If the relay goes short circuit.
Relay
abnormality
If the relay goes open circuit or
heater goes short circuit.
(when unit is not running)
The security circuit is activated
by independent temp. sensor if
the chamber is abnormal over-
Independent
heating.
over-heat
(When unit is running)
protection
The security circuit is activated
by independent temp. sensor if
the chamber is abnormal over-
heating.
* The buzzer tone resulting from the independent over-heat protection cannot be stopped with the alarm
buzzer stop key (BZ). Turn off the main switch.

Operation after power failure

The set value is memorized by nonvolatile memory. Accordingly, the incubator resumes the operation
with setting before power failure.
Situation
Alarm lamp lights.
All digits on the temp.
o
C or more. indicator flash.
Alarm lamp lights.
E01 is displayed on
the temp. indicator.
Alarm lamp lights.
E02 is displayed on
the temp. indicator.
Alarm lamp lights.
E03 is displayed on
the temp. indicator.
Alarm lamp lights.
E04 is displayed on
the temp. indicator.
Alarm lamp lights.
E05 is displayed on
the temp. indicator.
Without display
change.
Alarm lamp lights.
E05 is displayed on
the temp. indicator.
Indication
Intermittent tone
-----
Intermittent tone
Intermittent tone Heater OFF
Intermittent tone Heater OFF
Intermittent tone Heater OFF
Intermittent tone Heater OFF
Continuous tone
Continuous tone
(When the temp.
is decreased,
intermittent tone)
- 39 -
Buzzer Safety operation
-----
Key input is
-----
disabled.
Heater OFF
Heater OFF
forcedly by
external circuit.
Heater OFF
forcedly by
external circuit.
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