|
Trouble
|
Cause
|
Remedial action
|
|
BURN-OUT ?kAi-0ch
?l AL00 CH0
|
The room temperature
compensation input to the temperature controller
was disconnected. The chamber has been stopped. |
The sensor is loosely
connected to the RTD terminal on the temperature
controller board or there is an open circuit on
the board. |
Connect the sensor
properly to the RTD terminal on the temperature
controller board. If the same alarm occurs again,
call for service. |
|
BURN-OUT ?kAi-1ch
?l AL00 CH1
|
The dry-bulb input
to the temperature controller was disconnected.
The chamber has been stopped. |
The sensor is loosely
connected to the TD terminal (CH1)on the temperature
controller board or there is an open circuit in
the connected thermocouple. |
Connect the sensor
properly to the TD terminal(CH1) on the temperature
controller board. If the same alarm occurs again,
call for service. |
|
UPPER DEV. LIMIT
: TEMP. AL01
|
The temperature inside
the chamber has risen above the upper deviation
limit. The heater has been stopped until temperature
returns within range. |
Either specimens inside
the chamber 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
15°C higher than the target temperature. Resume testing.
If the same alarm occurs again, call for service. |
|
ABS.HIGH LIMIT
: TEMP. AL02
|
The temperature inside
the chamber has risen above the absolute high limit.
The chamber has been stopped. |
Either specimens inside
the chamber are generating heat or the absolute
high limit is set too low. |
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. |
|
ABS.LOW LIMIT
: TEMP. AL03
|
The temperature inside
the chamber has dropped below the absolute low limit.
The chamber has been stopped. |
Possible causes include
infiltrating of outside air, excessive cooling,
the effects of cooling sources inside the chamber,
and the absolute low limit being set too high. |
Check the chamber door
and cable port. If the refrigerator is on manual
control, correct the capacity setting. If cooling
sources are overcooling the chamber, reduce their
number. Then, resume testing. If the same alarm
occurs again, call for service. |
|
OVERHEATING AL06
|
The temperature inside
the chamber has risen above the overheat protector
setting (instrumentation panel). The chamber has
been stopped. |
Either specimens inside
the chamber are generating heat or the overheat
protector is set too low. |
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 overheat
protector is damaged or that the thermal
fuse has blown. Call for service. |
|
BLOWER FAILURE
AL07
|
The built-in temperature
switch of the air circulator
motor (electric parts compartment) tripped because
the motor is abnormally hot. The chamber has been
stopped. |
The
air circulator motor is either locked or overloaded,
perhaps because it is caught on something. |
Leave the chamber OFF
until the air circulator cools down. |
|
REFRIG. : OVERCURRENT
FAILURE AL08
|
The thermal
relay tripped because refrigerator operating
current was high. The chamber has been stopped. |
The refrigerator is
overloaded because of overheating, condenser
filter clogging or some other reason. |
Check if the condenser
filter is clogged. Correct as necessary and
reset the thermal relay.
Resume testing. If the same alarm occurs again,
call for service. |
|
REFRIG. : SURFACE
TEMP. HIGH AL08
|
The compressor temperature
switch tripped because refrigerator surface temperature
was high. The chamber has been stopped. |
The refrigerator is
overloaded because of overheating, condenser filter
clogging or some other reason. |
Check if the condenser
filter is clogged. Correct as necessary and
resume testing. If the same alarm occurs again,
call for service. |
|
REFRIG. : CONDENSER
FAN FAILURE AL08
|
The thermal
relay of the condenser fan tripped because fan
operating current was high. The chamber has been
stopped. |
The refrigerator is
overloaded because of overheating, condenser filter
clogging or some other reason. |
Check if the condenser
filter is clogged. Correct as necessary and
resume testing. If the same alarm occurs again,
call for service. |
|
POWER PHASE FAILURE
AL19
|
A reverse or open phase
was detected in the 3 primary
power supply connection. The chamber has been stopped.
|
Primary power supply
is not correctly connected to the chamber. |
An incorrect power
supply can seriously affect chamber components.
Set the main power switch (leakage breaker) in the
OFF position, and check/correct primary power supply
phase alignment and connections. If the same alarm
occurs again, call for service. |
|
COMMUNICATION
ERROR-1 (P-instrumentation)
|
The instrumentation
(CPU board) detected communication trouble in the
display board. The chamber has been stopped. |
Communication trouble
between CPU board and display board |
Reactivate the system
from the main power switch
(leakage beaker) and resume testing. If the same
alarm occurs again, call for service. |
|
COMMUNICATION
ERROR-2 AL99
|
The instrumentation
detected system trouble in the display board. The
chamber 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. |
|
COMMUNICATION
ERROR-4 AL99
|
The instrumentation
detected system trouble in the CPU board. The chamber
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. |
|
COMMUNICATION
ERROR-5 AL99
|
The instrumentation
detected system trouble in the CPU board. The chamber
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. |
|
COMMUNICATION
ERROR-6 AL99
|
The instrumentation
detected system trouble in the CPU board. The chamber
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 main power switch
is in the OFF position. |
Set the main
power switch in the ON position. |
| The
electric parts compartment door is open. |
Close the door. |
| There is a reverse
or open phase in the primary power supply connection. |
Reconnect the primary
power supply correctly. See "4.2 Drainage & Power
Supply Work". |
| Fuse F1 is blown. |
Replace
fuse F1. See "7.3 User Practical Servicing".
If the new fuse blows, call for service. |
|
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 chamber. See "7.3 User Practical Servicing". |
| The chamber is hot
on the inside, so internal pressure is high. |
There is nothing wrong
with the equipment. Proceed as planed. |
| The door is hard to
open. |
Internal pressure is
lower than room pressure. |
There is nothing wrong
with the equipment. Proceed as planned. |
| The door
is hard to open/close. |
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 chamber |
| Strange
odors are detected. |
Lingering odors inside
the chamber |
Clean the test area.
|
| Specimens are generated
odors. |
Remove the source of
the odor. |
| The chamber is vibrating. |
Adjuster feet are not
the proper height. (For caster-equipped chambers
only. Casters are optional.) |
Correct adjuster foot
height. |
| The viewing
window is clouded or forested over. |
Moisture inside the
chamber evaporated as temperature rose rapidly,whereby
driving up. |
There is nothing wrong
with the equipment. Proceed as planned. |
| The fuse in the forest
prevention heater blew |
Replace fuse
F2. |
| The chamber 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. |
The room is highly
humid. |
There is nothing wrong
with the equipment. Proceed as planned. |
| Fuse is blown. |
Replace fuse
F2. If the new fuse blows, call for service. |
| Temperature
is unstable. |
The door is open. |
Shut the door. |
| The cable port rubber
plug fell off. |
Fit the cable port
rubber 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. |
Specimens are generating
heat. |
Reduce the amount of
heat generated by specimens. |
| Frost has formed on
the cooler. |
Defrost
the chamber. |
| 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. |
| Specimens are generating
heat. |
Reduce the amount of
heat generated by 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 cooler. |
There is nothing wrong
with the equipment. Or defrost
the chamber. |
