Instruction Manual

50
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
• Failure in temperature input circuit.
• Temperature sensor is broken or
disconnected.
• The measured temperature is out of
the display range.
 Make a call for service.
SSR short-circuit detection
“ALARM” lamp lights on,
“Er.02” appears
• SSR 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.
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.
Abnormal fluid level
“ALARM” lamp lights on,
“Er.20” appears
• The quantity of the circulating fluid is
insufficient.
• Refer to page 46 "Abnormal fluid level"
 If the state does not recover, make a call
for service.
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.