Hitachi 902 Service Manual page 20

Alarm
Alarm
Control
No.
681 TEMP
CONTROL
691 INCUBA-
TOR
WATER
701 REF
WATER
711 DISTILLED
WATER
712 DIST
WATER
721 DIST
WATER
SENSOR
724 RESER-
VOIR
771 SIPPER
781 VACUUM
TANK
811 to PHOTOME-
813 TER LAMP
Sub-
Category Level
code
28 1
WARNING
28 2
WARNING
29 1 WARNING The water level of
30 1 WARNING A period of 24 hours has
31 1 STOP
31 2 WARNING The water level of distilled
32 1 WARNING The water level sensor in
34 1 WARNING The waste solution reservoir
37 1 STOP
38 1 WARNING Water is accumulated in the
41 1 WARNING In passed cell blank
41 2 S.STOP
(Restart
un-
allowable
41 3 S.STOP
(Restart
un-
allowable)
Description
The water temperature of
incubation bath is higher
than 45.0°C.
The water temperature of
incubation bath is outside a
range of 37 ± 0.5°C.
(This is checked only at
operation.)
incubation bath is too low.
passed since exchange of
incubation bath water.
The water level of distilled
water tank is too low.
(This alarm will not be
issued during initialization
and water exchange.)
water tank is too low.
distilled water tank is
abnormal.
is full.
The negative pressure of
vacuum pump is too low.
vacuum tank.
measurement, a value of
more than 3.3 Abs is
indicated in any one of 4
measurements.
(3 times or less)
In passed cell blank
measurement, a value of
more than 3.3 Abs is
)
indicated for all of ADC1,
ADC2 and λ to λ
1
The above alarm code 41-1
is issued 10 times
consecutively.
2 - 8
Remedy
Check the thermistor
or thermostat of
heater.
Same as above
Replenish water or
check the drain
solenoid valve.
Exchange incubation
bath water.
Check the water level
sensor.
Same as above
Check float switch.
Check waste solution
tank detection.
Check vacuum level
at vacuum suction.
Check SV12 or SV14.
(1) Replace light
source lamp.
(2) Check 12 V
power supply.
.
12
(cont'd)