Alarm This unit is equipped as standard with a function allowing 15 kinds of alarms to display on the LCD and can be read out by serial communication. Also, it can generate relay output for upper/lower temperature limit alarm and output cut-off alarm. Maintenance Maintenance of this unit is performed only in the form of return to and repair at SMC’s site. As a rule, SMC will not conduct on-site maintenance. Separately, the following parts have a limited life and need to be replaced before the life ends. Parts Life Expectation Alarm Alarm code Operation status Main reason WRN ERR00 ERR01 ERR03 ERR04 Continue Stop Stop Stop Stop ERR11 Stop ERR12 Stop The temperature has exceeded the upper or lower limit of the target temperature. The CPU has crashed due to noise, etc. The contents of the CPU cannot be read out correctly when the power supply is turned on. The data cannot be written to EEPROM. The DC power supply has failed (due to fan stop or abnormal high temperature) or the thermo-module has been short-circuited. ERR16 Stop The flow rate of the circulating fluid has dropped. ERR17 Stop The internal temperature sensor has been disconnected or short-circuited. ERR19 ERR20 Stop Stop Auto tuning has not been completed within 20 minutes. The amount of circulating fluid in the tank has dropped. The internal temperature sensor has exceeded the upper limit of cut-off temperature. ERR13 Stop The internal temperature sensor has exceeded the lower limit of cut-off temperature. ERR14 Stop The thermostat has been activated due to filter clog or fan/pump failure, etc. ERR15 Continue The temperature cannot be changed even at 100% output due to overload or disconnection of the thermo-module. ERR18 Alarm description Upper/Lower temp. limit alarm CPU hung-up CPU check error Back-up data error EEPROM writing error DC power supply failure Internal temp. sensor high temp. error Low flow rate alarm (option) Internal temp. sensor disconnection alarm Abnormal auto tuning alarm Low fluid level alarm Internal temp. sensor low temp. error Thermostat alarm Abnormal output alarm External temp. sensor disconnection alarm Continue The external temperature sensor has been disconnected or short-circuited. (Only detected when in learning control or external tune control) The contents of the back-up data cannot be read out correctly when the power supply is turned on. Description Expected life 3 to 5 years 5 to 10 years 5 to 10 years Pump Fan DC power supply Display panel 50,000 hours (approx. 5 years) Possible failure The bearing is worn so the pump fails to transfer the circulating fluid, which results in temperature control failure. The bearing uses up lubrication and makes the fan unable to supply enough air, which deteriorates the cooling and heating capacity. The capacity of the electrolytic condenser decreases, and causes abnormal voltage which results in DC power supply failure and stops the Thermo-con. The display turns off when the backlight of the LCD reaches the end of its life. Series HEC-A 1392