|
Problem
|
Cause
|
Action
|
| PHASE REVERSED |
The reverse phase prevention
relay tripped. The chamber has stopped. |
Primary power supply
is not correctly connected to the chamber. |
Check primary
power connections. From the left, phases should
be in the order of R - S - T. |
| REF. HIGH STAGE FAILURE |
The refrigerator high
temperature switch, motor protector or thermal relay
tripped. The chamber has stopped. |
The compressor/motor
may have overheated. Overcurrent is another possibility. |
Check ambient/water
temperature are within allowable ranges, there is
sufficient space above/behind the chamber, and power
supply voltage is not fluctuating. If these are
not a problem, shut OFF power and call for service. |
| REF. LOW STAGE FAILURE |
The refrigerator low
temperature switch, motor protector or thermal relay
tripped. The chamber has stopped. |
The compressor/motor
may have overheated. Compressor surface temperature
may have dropped. Overcurrent is another possibility. |
Check ambient/water
temperature are within allowable ranges, there is
sufficient space above/behind the chamber, power
supply voltage is not fluctuating and the evaporator
is not frosted over. If these are not a problem,
shut OFF power and call for service. |
| HIGH TEMP:AIR CIRCULATOR
1 |
The thermal relay of
high temperature chamber circulator 1 tripped. The
chamber has stopped. |
The air circulator
may be overloaded or the motor locked up. |
Shut OFF power and
call for service. |
| HIGH TEMP:AIR CIRCULATOR
2 |
The thermal relay of
high temperature chamber circulator 2 tripped. The
chamber has stopped. |
The air circulator
may be overloaded or the motor locked up. |
Shut OFF power and
call for service. |
| LOW TEMP:AIR CIRCULATOR
1 |
The thermal relay of
low temperature chamber circulator 1 tripped. The
chamber has stopped. |
The air circulator
may be overloaded or the motor locked up. |
Frost buildup may have
overloaded the unit. Stop test and defrost the unit.
If the same alarm occurs again, call for service. |
| LOW TEMP:AIR CIRCULATOR
2 |
The thermal relay of
low temperature chamber circulator 2 tripped. The
chamber has stopped. |
The air circulator
may be overloaded or the motor locked up. |
Frost buildup may have
overloaded the unit. Stop test and defrost the unit.
If the same alarm occurs again, call for service. |
| OVERHEAT PROTECTOR
TRIP |
The (operating panel)
overheat protector tripped.
The chamber has stopped. |
Test area temperature
rose above the overheat setting. |
Check the overheat
protector is set at least 10°C higher than the target
high temperature. If overshoot is high, lower preheat
temperature. If equipped with a variable velocity
device, poor air circulation may be the cause. Increase
velocity. |
| OVERCOOL PROTECTOR
TRIP |
The (operating panel)
overcool protector tripped.
The chamber has stopped. |
Test area temperature
dropped below the setting. |
Check the overcool
protector is set at least 10°C lower than target
low temperature. If overshoot is high, raise preheat
temperature. |
| AMB TEMP: AIR CIRCULATOR |
The thermal relay of
the ambient temperature air circulator tripped.
The chamber has stopped. |
The air circulator
may be overloaded or the motor locked up. |
Shut OFF power and
call for service. |
| TEST AREA DOOR OPEN |
The test area door
switch has tripped. Testing has been suspended. |
The door was opened
during chamber operation. |
Close the
door and press the RESUME button on the Operation
Mode Selection display. |
| LOW AIR SUPPLY PRESSURE
WARNING |
Air supply pressure
has dropped below the specified level. The chamber
is still running. |
Air pressure can become
low after long periods of disuse. Also, air supply
may be OFF. |
Check
air supply. If an air compressor is built-in,
check to see if it is running properly and pressure
rises. |
| AIR SUPPLY CIRCUIT
DOWN |
Air supply pressure
has dropped below the specified level without recovering.
The chamber has stopped. |
Air supply is OFF or
supply pressure is low. |
Check
air supply. If an air compressor is built-in,
check to see if it is running properly and pressure
rises. If everything is OK, there may be an air
leak. Call for service. |
| WATER SUSPENSION RELAY
TRIP |
Condenser (refrigeration)
cooling water pressure dropped and tripped the water
suspension relay. The chamber has stopped. |
Possible causes are
flow from cooling tower being stopped (water supply
pump), a closed water supply valve, a clogged return
valve or strainer, or piping leaks. |
Set the POWER key to
OFF and check the above. Correct as necessary and
resume operation. If the same alarm occurs again,
call for service. |
| REF: HIGH-STAGE PRESSURE
FAILURE |
The refrigerator's
high temperature side high/low pressure switch tripped.
The chamber has stopped. |
Compressor refrigerant
pressure may be high or vapor pressure low. |
Check surrounding temperature
and water temperature are within allowable ranges,
the condenser strainer
is not clogged, and sufficient ventilation space
is allotted above and behind the chamber. If the
problem is elsewhere, shut OFF power and call for
service. |
| REF: LOW-STAGE PRESSURE
FAILURE |
The refrigerator's
low temperature side high/low pressure switch has
tripped. The chamber has stopped. |
Compressor refrigerant
pressure may be high or vapor pressure low. |
Check surrounding temperature
and water temperature are within allowable ranges,
the condenser strainer is not clogged, and sufficient
ventilation space is allotted above and behind the
chamber. If the problem is elsewhere, shut OFF power
and call for service. |
| CONDENSER FAN FAILURE |
The thermal relay on
condenser fan circuit tripped. The chamber has stopped. |
The fan has overheated. |
Check surrounding temperature
is within allowable ranges, sufficient ventilation
space is allotted above and behind the chamber,
and voltage is not fluctuating. If the problem is
elsewhere, shut OFF power and call for service. |
| HIGH TEMP ABS. HIGH
TEMP |
The high temperature
chamber absolute high temperature (software) alarm
tripped. The chamber has stopped. |
Possible causes are
air circulation loss due to excessive specimen load,
open or disconnected temperature sensor (CH2), or
inadequate damper operation because of low air pressure. |
Check specimen quantity
and air pressure. If
the "BURN-OUT" alarm is also displayed, check the
temperature sensor connection. |
| TEST AREA: UP STREAM
OVERHEAT |
The test area upstream
overheat (software) alarm tripped. The chamber has
stopped. |
Possible causes are
air circulation loss due to excessive specimen load,
open or disconnected temperature sensor (CH1), or
inadequate damper operation because of low air pressure. |
Check specimen quantity
and air pressure. If
the "BURN-OUT" alarm is also displayed, check the
temperature sensor connection. |
| TEST AREA: DOWN STREAM
OVERHEART |
The test area downstream
overheat (software) alarm tripped. The chamber has
stopped. |
Possible causes are
air circulation loss due to frost buildup, open
or disconnected temperature sensor (CH3), or inadequate
damper operation because of low air pressure. |
First check air
pressure. Stop test and defrost the unit. If
the " BURN-OUT " alarm is also displayed, check
the temperature sensor connection. |
| LOW TEMP ABS. HIGH
TEMP |
The low temperature
chamber absolute high temperature (software) alarm
tripped. The chamber has stopped. |
Possible causes are
air circulation loss due to frost buildup, open
or disconnected temperature sensor (CH4), or inadequate
damper operation because of low air pressure. |
First check air
pressure. Stop test and defrost the unit. If
the "BURN-OUT" alarm is also displayed, check the
temperature sensor connection. |
| LOW TEMP ABS. LOW TEMP |
The low temperature
chamber absolute low temperature (software) alarm
tripped. The chamber has stopped. |
Possible causes are
air circulation loss due to excessive specimen load
or high overshoot because of low precool temperature. |
Check specimen quantity
and precool temperature. To prevent overshoot, change
the Overcool Set setting in the test pattern. |
| TEST AREA:UP STREAM
HIGH DEV TEMP |
The test area upstream
overcool (software) alarm tripped. The chamber has
stopped. |
Possible causes are
air circulation loss due to excessive specimen load
or high overshoot because of low precool temperature. |
Check specimen quantity
and precool temperature. To prevent overshoot, change
the Overcool Set setting in the test pattern. |
| TEST AREA:DOWN STREAM
HIGH DEV TEMP |
The test area downstream
overcool (software) alarm tripped. The chamber has
stopped. |
Possible causes are
air circulation loss due to excessive specimen load
or high overshoot because of low precool temperature. |
Check specimen quantity
and precool temperature. To prevent overshoot, change
the Overcool Set setting in the test pattern. |
| CONTROL POWER VOLTAGE
LOW |
Control power voltage
is low. The chamber has stopped. |
There is a problem
in the 24V DC drive circuit. |
Shut OFF power and
call for service. |
| I/O CONTROLLER FAILURE |
Trouble has occurred
in the I/O controller (instrumentation). The chamber
has stopped. |
There is a problem
in the I/O controller. |
Shut OFF power and
call for service. |
| BURN-OUT: CH1 |
The test area upstream
sensor (CH1) signal is dead. The chamber has stopped. |
The sensor has an open
circuit or is disconnected. |
Shut OFF power
and reconnect or replace the sensor. |
| BURN-OUT: CH2 |
The high temperature
chamber temperature sensor (CH2) signal is dead.
The chamber has stopped. |
The sensor has an open
circuit or is disconnected. |
Shut OFF power and
reconnect or replace the
sensor. |
| BURN-OUT: CH3 |
The test area downstream
sensor (CH3) signal is dead. The chamber has stopped. |
The sensor has an open
circuit or is disconnected. |
Shut OFF power and
reconnect or replace the
sensor. |
| BURN-OUT: CH4 |
The low temperature
chamber temperature sensor (CH4) signal is dead.
The chamber has stopped. |
The sensor has an open
circuit or is disconnected. |
Shut OFF power and
reconnect or replace the
sensor. |
| BURN-OUT: CH5 |
The condenser sensor
(CH5) signal is dead. The chamber has stopped. |
The sensor has an open
circuit or is disconnected. |
Shut OFF power and
reconnect or replace the
sensor. |
| BURN-OUT: CH6 |
The Suction tube sensor
(CH6) signal is dead. The chamber has stopped. |
The sensor has an open
circuit or is disconnected. |
Shut OFF power and
reconnect or replace the
sensor. |
| FROST WARNING |
The evaporator is frosted
over, but not seriously enough to stop the chamber. |
Moisture in the air
is collecting on the evaporator. |
Manually defrost the
unit, the interval time of the Defrost should be
shortly in the test pattern. |
|
FROSTED OVER
|
The evaporator is frosted over.
The chamber has stopped to protect the refrigeration
system.
|
Excessive frost buildup is preventing
proper refrigeration operation. Defrost Cycle
is not properly set or precooling lasts too long.
|
Manually defrost the unit, the
interval time of the Defrost should be shortly
in the test pattern, or select the auto defrost
mode.
|
|
SYSTEM ERROR: 001
|
The instrumentation detected system
trouble in EZ-MCU. The chamber has been stopped.
|
Memory error in EZ-MCU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
SYSTEM ERROR: 002
|
The instrumentation detected system
trouble in EZ-MCU. The chamber has been stopped.
|
Stack error in EZ-MCU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
SYSTEM ERROR: 003
|
The instrumentation detected system
trouble in EZ-MCU. The chamber has been stopped.
|
Subunit data read error in EZ-101
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
LAN CABLE ERROR: PCU
|
The instrumentation detected communication
trouble between EZ-MCU and PCU. The chamber has
been stopped.
|
Disconnected or open circuit in
LAN cable between EZ-MCU and PCU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
LAN CABLE ERROR: PSU
|
The instrumentation detected communication
trouble between EZ-MCU and PSU. The chamber has
been stopped. Simultaneously, the fail signal
was output from EZ-MCU and shut down the instrumentation
circuit.
|
Disconnected or open circuit in
LAN cable between EZ-MCU and PSU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
SYSTEM ERROR:PCU
|
The instrumentation detected system
trouble in EZ-PCU. The chamber has been stopped.
|
Memory or stack error in EZ-PCU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
SYSTEM ERROR:PSU
|
The instrumentation detected system
trouble in EZ-PSU. The chamber has been stopped.
|
Memory or stack error in EZ-PSU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
|
PSU SEQUENCE ERROR
|
The instrumentation detected sequence
trouble in EZ-PSU. The chamber has been stopped.
|
Program error in EZ-PSU
|
Reactivate the system from the
main power switch (leakage
breaker) and resume testing. If the same alarm
occurs again, call for service.
|
