Manual

42
In the Event of Failure…
Safety Device and Error Code
This unit has an automatic diagnosis function built in the controller and safety devices independent of the
controller. The table below shows the cause and the solution method when the safety device operates.
Error Code:
When an abnormal condition occurs, an error code appears and the ALARM lamp lights in the controller,
the buzzer sounds simultaneously. Record the error code and turn off the power of device
immediately.
Safety Device Notify Cause/Solution
Temperature input error
“ALARM” lamp lights on,
“Er.01” appears
• Failure in temperature input circuit.
• Temperature sensor is broken or
disconnected.
• Measured temperature is out of display
range.
 Make a call for service.
Memory error
“ALARM” lamp lights on,
“Er.15” appears
• Failure in internal memory.
 Make a call for service.
Flow rate error
“ALARM” lamp lights on,
“Er.20” appears
• The circulating fluid does not properly
circulate.
• Air remains in the circulating path.
 Make a call for service.
Measurement temperature
error
“ALARM” lamp lights on,
“----” appears
• Upper limit alarm of the temperature
alarm function is activated.
 Make a call for service.
Refrigerator pressure error
“REFRIGERATO ERROR”
lamp lights on
• The condenser filter is dirty.
• The room temperature is high.
 Make a call for service.