Shini SHD - Actual Temperature Exceeds the Maximum Temperature-Over Heat

Shini Group
Technology & Marketing Dept
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load, resulting in fan overload. In the case, you only need clean the filter to
eliminate the fault.
When check the fault, you must pay attention may there be a number of motors’
overload signals are connected to a overload signal input, so you need to check
the operating state of each motor.
4.4.4 Actual temperature exceeds EGO setpoint—Over heat alarm E-04
When the alarm occurs, corresponding alarm indicator of control panel lights, LED
digital display area shows the fault code.
The alarm indicates temperature control system broke down, causing the heat
system run abnormally.
According to the following steps to eliminate fault:
Check whether the contactor is working properly. In non-energized case, check
the electromagnetic contactor moving contact parts are normal action, if action is
not available, it is recognized contactor damage, if you can operate normally, you
need to energize the machine, when the actual temperature reaches the setpoint,
observe whether contactor movable contact is separate from stationary contact, if
separated the contactor is working properly, if there is no separation, can be
confirmed contactor is working properly by measuring contactor contact voltage, if
electromagnetic contactor contact is still measured the same voltage and control
voltage when actual temperature reaches the setpoint, you can confirm the
microcomputer fault, if not, you can confirm the mechanical part of contactor fault.
Check whether EGO settings are appropriate. EGO setpoint has been adjusted
well when the factory. In general, EGO setpoint is 20℃ higher than the maximum
temperature which can be set. If the setpoint of EGO is changed, leading to
setpoint is less than the heating temperature requirements, it will trigger this alarm.
You just need to reset the EGO in the case.
Check whether blower is working properly. As actual temperature is measured by
measuring air temperature, thermocouple will measure a stable low temperature
value if the blower is not running, lead to temperature controller has an output
signal to heating pipe to heat all the time, resulting in over-temperature alarm.
Confirm microcomputer panel internal parameters are correct. Microcomputer
panel internal save the PID parameters for controlling temperature heat method, if
the parameters are not correct, will cause heating system heat abnormally.
4.4.5 Actual temperature exceeds the maximum temperature—Over heat
alarm E-05