Owner manual

51
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
Sensor trouble detection
“ALARM” lamp lights on,
“Er.01” appears
• Temperature sensor is broken or
disconnected.
• Make a call for service.
SSR short-circuit detection
“ALARM” lamp lights on,
“Er.02” appears
• Triac is in short-circuit
• Make a call for service.
Heater disconnecting
detection
“ALARM” lamp lights on,
“Er.03” appears
• Heater is disconnected.
• Make a call for service.
Measured temperature lower
limit error
“ALARM” lamp lights on,
“Er.13” appears
• When the temperature warning
function issues a lower limit warning
• Make a call for service.
Memory error
“ALARM” lamp lights on,
“Er.15” appears
• Failure in internal memory.
• Make a call for service.
Internal communication error
“ALARM” lamp lights on,
“Er.17” appears
• Failure in internal communication or
temperature inputting circuit.
• Make a call for service.
Overheating
“ALARM” lamp lights on,
“Er.19” appears
• Overheating prevention device is in
operation.
• Reset the power supply, and then
adjust the setting temperature of the
overheating protection device.
• If the state does not recover, 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.
Measurement temperature
error
“ALARM” lamp lights on,
“----” appears
• Measurement value is out of display
range.
• Make a call for service.
Refrigerator pressure error
“REFRIGERATO ERROR”
lamp lights on
• The condenser filter is dirty.
• The room temperature is high.
• The temperature of the circulating fluid
is 40°C or higher.