Phcbi MPR-722 Series, Руководство по эксплуатации

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ALARM FUNCTIONS
This unit has the alarms functions listed below.
Contact our sales representative or agent if the alarm is not resolved by eliminating the following causes.
Before calling for service, take some precautions to prevent the stored items (for example by transferring
the items to another freezer).
Alarms Cause Indication Buzzer Remote alarm
High- temperature
alarm
The chamber temperature is
higher than the setting of the
high-temperature alarm. [page
23]
The alarm indicator blinks.
The chamber temp. blinks. Intermittent tone with
15 minutes delay. Alarm mode with
15 minutes delay.
Air circulation
alarm The chamber temperature
distribution gets worse
The alarm indicator blinks.
Intermittent tone with
15 minutes delay. Alarm mode with
15 minutes delay.
Low- temperature
alarm
The chamber temperature is
lower than the setting of the
low-temperature alarm. [page
24]
The alarm indicator blinks.
The chamber temp. blinks. Intermittent tone with
15 minutes delay. Alarm mode with
15 minutes delay.
0 o C alarm
The chamber temperature is
lower than 0
o
C
The alarm indicator blinks.
The chamber temp. blinks.
Intermittent tone Alarm mode.
Power failure
alarm
A power failure has occurred.
The power supply cord is
disconnected.
----- ----- Alarm mode.
Power failure
alarm
(with MPR-48B1) A power failure has occurred.
The power supply cord is
disconnected.
The alarm indicator blinks. Intermittent tone Alarm mode.
Door alarm The door is open.
The door check indicator
blinks. Intermittent tone with
2 minutes delay.
-----

The alarm status of remote alarm terminal is cancelled by pressing the buzzer stop key (BUZZER)
since the remote alarm is operated in conjunction with buzzer. (except for power failure alarm status)
Air circulation alarm
The alarm indicator blinks and the buzzer sounds (after 15 minutes) when the sensor detects that the
chamber temperature distribution is getting worse extremely. This may be caused by the block of cold air
in the chamber due to the frost on the evaporator or stop of cooling fan motor.
 The air circulation is detected by the exclusive alarm sensor attached to the center of the chamber.
SAFETY FUNCTIONS
This unit has the safety functions listed below.
Safety Cause Indication, Buzzer Safety operation
Over-heat
protection When the chamber temp. is higher
than about 30
o C.
-----
The heaters are OFF.
Fan motor for cold air circulation is OFF and
reset when the chamber temp. is lower than
about 25
o C.
Over-cool
protection When the chamber temp. is lower
than about -1
o C.
-----
Compressor is OFF and reset when the
chamber temp. is higher than about 6
o C.
Auto-return
When there is no key pressing in
setting mode for 90 seconds.
-----
Finishing of setting mode and returning to
temp. display mode.
Key lock When the key lock is ON (L1). ----
Change of chamber temp. setting is
disabled.