|
Trouble
|
Cause
|
Remedial action
|
|
AL00
CH00
|
The room temperature
compensation input to the temperature controller
was disconnected. The cabinet has been stopped. |
The sensor is loosely
connected to the RTD terminal on the ES102C temperature
controller board or there is an open circuit on
the ES102C board. |
Turn control power
OFF from the POWER
key and resume testing. If the same alarm occurs
again, call for service. |
|
AL00
CH01
|
The dry-bulb input
to the temperature controller was disconnected.
The cabinet has been stopped. |
The sensor is loosely
connected to the CH1 terminal on the ES102C temperature
controller board or there is an open circuit in
the connected thermocouple. |
Turn control power
OFF from the POWER
key and resume testing. If the same alarm occurs
again, call for service. |
|
AL00
CH02
(Not applicable
to LU cabinet)
|
The wet-bulb input
to the temperature controller was disconnected.
The cabinet has been stopped. |
The sensor is loosely
connected to the CH2 terminal on the ES102C temperature
controller board or there is an open circuit in
the connected thermocouple. |
Turn control power
OFF from the POWER
key and resume testing. If the same alarm occurs
again, call for service. |
|
AL01
|
The temperature inside
the cabinet has risen above the upper deviation
limit. The heater has been stopped until temperature
returns within range. |
Either specimens inside
the cabinet are generating heat or the upper deviation
limit is set too low. |
Remove the heat-generating
specimens and/or set the upper deviation limit about
10°C higher than the target temperature. When temperature
returns within range, normal control is restored
automatically. The alarm can be cleared by pressing
the 
or 
keys. |
|
AL02
|
The temperature inside
the cabinet has risen above the absolute high limit.
The cabinet has been stopped. |
Either specimens inside
the cabinet are generating heat or the upper deviation
limit is set too low. |
Turn control power
OFF from the POWER
key. Then, remove the heat-generating specimens
and/or set the absolute high limit about 15°C higher
than the target temperature. Resume testing. If
the same alarm occurs again, call for service. |
|
AL03
|
The temperature inside
the cabinet has dropped below the absolute low limit.
The cabinet has been stopped. |
Possible causes include
infiltrating of outside air, excessive cooling,
the effects of cooling sources inside the cabinet,
and the absolute low limit being set too high. |
Turn control power
OFF from the POWER key
and check the cabinet door and cable port. Reset
the refrigerator control setting. If cooling sources
are overcooling the cabinet, reduce their number.
Also, correct the absolute low limit setting as
necessary. Then, resume testing. If the same alarm
occurs again, call for service. |
|
AL06
|
The temperature inside
the cabinet has risen above the overheat protector
setting (instrumentation panel). The cabinet has
been stopped. |
Either specimens inside
the cabinet are generating heat or the overheat
protector is set too low. |
Turn control power
OFF from the POWER
key. Remove the heat-generating specimens and/or
correct the overheat protector setting. Resume testing.
If the same alarm occurs again, it is possible that
the thermal fuse has blown. Call for service. |
|
AL07
|
The built-in temperature
switch of the air circulator motor (water circuit
[heat exhaust] compartment) tripped because the
motor was abnormally hot. The cabinet has been stopped. |
The air circulator
motor is overloaded. |
Leave the cabinet OFF
until the air circulator cools down. Then, turn
control power ON from the POWER
key and resume testing. |
|
AL21
|
Humidifier surface
temperature rose and tripped the boil-dry protector.
The cabinet has been stopped. |
Humidifier surface
temperature rose above the trip temperature. |
Turn control power
OFF from the POWER
key and check water level
in the humidifying tray water level regulator.
Reposition the regulator as necessary and wait till
the humidifier cools. Then, resume testing. If the
same alarm occurs again, call for service. |
|
AL22
|
The humidity inside
the cabinet has risen above the absolute high limit.
Humidity control has been stopped until humidity
returns within range. |
The absolute high limit
is set lower than the target humidity. |
Set the absolute high
limit about 10%RH higher than the target humidity.
When humidity returns within range, normal control
is restored automatically. The alarm can be cleared
by pressing the or keys. |
|
AL23
|
The humidity inside
the cabinet has dropped below the absolute low limit.
The heater has been stopped and refrigerator capacity
decreased to the minimum (turned OFF in some cases)
until humidity returns within range. |
The absolute low limit
is set higher than the target humidity. |
Set the absolute low
limit about 10%RH lower than the target humidity.
When humidity returns within range, normal control
is restored automatically. The alarm can be cleared
by pressing the or keys. |
|
AL26
|
During humidity testing,
the wet-bulb (measures relative humidity) rose above
the specified temperature. *This alarm can be triggered
during operation at low temperature and high humidity
or when the target humidity is changed. There is
nothing wrong with the equipment. Silence the buzzer
and continue testing. |
Humidity control will
continue as is, but humidity control might destabilize
and trigger a humidity alarm.The wet-bulb wick (gauze)
inside the cabinet may be dry. |
Stop the cabinet and
replace the wick. After
wet-bulb temperature returns within the specified
range, the alarm can be cleared by pressing the
or
keys. |
| The water tank is empty.
Humidity control will continue, but it will eventually
stop unless water is replenished. |
The water tank is empty. |
Refill the portable
(option) water tank and resume testing. After water
has been sufficiently supplied to the main water
tank, the alarm can be cleared by pressing the or
keys.If the same alarm occurs again, call for service.
|
|
AL99
|
The instrumentation
detected communication trouble between the CPU board
and display board. The cabinet has been stopped. |
Communication error
between the CPU board and display board |
Reactivate the system
from the main power switch
(leakage breaker) and resume testing. If the same
alarm occurs again, call for service. |
| The instrumentation
detected system trouble in the display board. The
cabinet has been stopped. |
Display board error
(i.e.: internal memory, etc.) |
Reactivate the system
from the main power switch
(leakage breaker) and resume testing. If the same
alarm occurs again, call for service. |
| The instrumentation
detected system trouble in the CPU board. The cabinet
has been stopped. |
Sequence task error
on CPU board |
Reactivate the system
from the main power switch
(leakage breaker) and resume testing. If the same
alarm occurs again, call for service. |
| The instrumentation
detected system trouble in the CPU board. The cabinet
has been stopped. |
Refrigeration task
error on CPU board |
Reactivate the system
from the main power switch
(leakage breaker) and resume testing. If the same
alarm occurs again, call for service. |
| The instrumentation
detected system trouble in the CPU board. The cabinet
has been stopped. |
Temperature control
task error on CPU board |
Reactivate the system
from the main power switch
(leakage breaker) and resume testing. If the same
alarm occurs again, call for service. |
| The instrumentation
panel does not light up after pressing the POWER
key. |
Primary power supply
is OFF. |
Activate the primary
power supply. |
| The display goes out
all of sudden or the displayed information is strange. |
System trouble or internal
board trouble |
Switch the main
power switch OFF and ON. If the same trouble
reoccurs, call for service. |
| The door
is hard to close. |
Something is caught
in the door. |
Remove the obstruction. |
| Frost has formed and
hardened on the door packing. |
Defrost
the cabinet. See "7.3 User Practical Servicing". |
| Internal pressure is
high because the cabinet is hot and highly humid
on the inside. |
There is nothing wrong
with the equipment. Proceed as planned. |
| The door
is hard to open. |
Internal pressure is
lower than room pressure. |
There is nothing wrong
with the equipment. Proceed as planned. |
| Frost has formed and
hardened on the packing. |
Defrost
the cabinet. See "7.3 User Practical Servicing". |
| During
operation below zero, icicles 5 cm or longer formed
on the internal drain port, or the test area is
covered in frost. (Not applicable to LH or LHL cabinets) |
Outside air has infiltrated
through the cable port. |
Cover the cable port
with the cap or rubber plug. |
| Door packing is not
properly sealing the door and frame, or packing
has deteriorated. |
Call for service. |
| Strange noises are
heard. |
The condenser filter
is clogged. |
Clean
the filter. |
| Strange
odors are detected. |
Lingering odors inside
the cabinet |
Clean the test area.
See "6.3 Maintenance". |
| Specimens are generated
odors. |
Remove the source of
the odor. |
| The cabinet is wet
on the outside. |
The room is highly
humid. |
There is nothing wrong
with the equipment. Proceed as planned. |
| Frost has formed on
door hinges and around the door frame and viewing
window. (Not applicable to LH or LHL cabinets) |
The room is highly
humid. |
There is nothing wrong
with the equipment. Proceed as planned. |
| Temperature
(&humidity) is unstable. |
The door is open. |
Shut the door. |
| The cable port is not
covered. |
Reattach cap or plug. |
| Ambient temperature
changes more than 5°C/hr. |
Stabilize ambient temperature
and resume testing. |
| High heat load equipment
is being turned ON/OFF. |
Reduce the heat load. |
| Temperature
gradually rises higher than the target temperature. |
Specimen heat load
is high. |
Reduce the specimen
heat load. |
| Frost has formed on
the cooler. |
Defrost
the cabinet (Not necessary for LH cabinets). See
"7.3 User Practical Servicing". |
| Settings cannot be
changed. |
The keys are locked. |
Unlock
the keys. |
| Temperature
heat-up/pull-down rate does not satisfy specifications. |
The door is open. |
Shut the door. |
| Specimen heat load
is high. |
Reduce the amount of
specimens. |
| Ambient temperature
too low (high). |
Raise (Lower) ambient
temperature. |
| Temperature stops rising
or begins to drop during heat-up. |
Frost has formed on
the dehumidifying-cooler. |
There is nothing wrong
with the equipment. Defrost
the cabinet, if necessary. |
| Poor temperature
uniformity |
Air flow inside the
cabinet is poor. |
Rearrange specimens
so as not block air flow. |
| Specimen heat load
is high. |
Reduce the amount of
specimens. |
| Frost has formed on
the cooler. |
Defrost
the cabinet (Not necessary for LH cabinet) |
