|
Trouble
|
Cause
|
Remedial action
|
|
AL00
CH00
|
The room temperature
compensation input to the temperature controller
was disconnected. The oven 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 oven 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. |
|
AL01
|
The temperature inside
the oven has risen above the upper deviation limit.
The heater has been stopped until temperature returns
within range. |
Either specimens inside
the oven 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 
key. |
|
AL02
|
The temperature inside
the oven has risen above the absolute high limit.
The oven has been stopped. |
Either specimens inside
the oven are generating heat or the absolute high
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. Then, resume
testing. If the same alarm occurs again, call for
service. |
|
AL03
|
The temperature inside
the oven has dropped below the absolute low limit.
The oven has been stopped. |
The absolute low limit
is set too high. |
Turn control power
OFF from the POWER key. Correct the absolute low
limit setting. Then, resume testing. If the same
alarm occurs again, call for service. |
|
AL06
|
The temperature inside
the oven has risen above the overheat protector
setting (instrumentation panel). The oven has been
stopped. |
Either specimens inside
the oven 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
(Not applicable for LG)
|
The built-in temperature
switch of the air circulator motor (electrical parts
compartment) tripped because the motor was abnormally
hot. The oven has been stopped. |
The air circulator
motor is overloaded. |
Leave the oven OFF
until the air circulator cools down. Then, turn
control power ON from the POWER key and resume testing.
|
|
AL99
|
The instrumentation
detected communication trouble between the CPU board
and display board. The oven 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
oven 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
panel does not light up after pressing the POWER key. |
Primary power supply
is OFF. |
Activate the primary
power supply. |
| The
main power switch (leakage breaker) is in the
OFF position. |
Set the switch in the
ON position. |
| Power supply phase
is not correctly wired. |
Properly connect phases.
See "3.2 Power Supply Work". |
| 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. |
| Internal pressure is
high because the oven is hot 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. |
| Strange
odors are detected. |
Lingering odors inside
the oven |
Clean the test area.
See "6.1 Check and Maintenance Lists". |
| Specimens are generated
odors. |
Remove the source of
the odor. |
| The viewing window
is fogged up. |
Test area humidity
rose as high temperatures evaporated moisture. |
There is nothing wrong
with the equipment. Proceed as planned. |
| Temperature
is unstable. |
The door is open. |
Shut the door. |
| The cable port is not
covered. |
Reattach cap or plug
(option). |
| The
exhaust port (oven top) is open. |
Close the port. |
| Settings cannot be
changed. |
The keys are locked. |
Unlock
the keys. See "5.2 User Setup and Safety Device
Options Setup". |
| Temperature
heat-up 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. |
Raise ambient temperature. |
| Poor temperature
uniformity |
Air flow inside the
oven is poor. |
Rearrange specimens
so as not block air flow. |
| Specimens are generating
heat. |
Reduce the amount of
specimens. |
| Outside air has infiltrated
the system through door
packing or the cable port. |
Prevent air penetration. |
