Zibro Tectro SRE 703 injection - E-7 DISPLAY: Room Temperature Issues; E-8 DISPLAY: Blower Motor Issues

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E-7 DISPLAY
Explanation 1
Also see Explanation 1 of Explanation 1 E-1 Display.
E-8 DISPLAY
Explanation 1
If the Blower Motor shows an abnormally high revolution (which is not
controlled) in the Med, Med-Low or Low, the Main Circuit Board is
defective.
Explanation 2
In most of the failure cases of the Blower Motor, the Heater stops its
operation with “
E-8” as displayed, after the finish of preheating.
The failure of the Motor is caused by electric disconnection, defective
voltage of the Main Circuit Board, or output failure of the Hall IC. If this
occurs, measure the current or the voltage with the Tester. See the
Explanation 4 of E-2 Display
Explanation 3
Even if the Circulation Fan Motor is slightly inclined, it touches the blower
case and, therefore, becomes unable to rotate. This inclination is caused
by loose screw.
E-8 is displayed and the
heater is extinguished.
Blower Motor shows an
extraordinary high
revolution.
Explanation 1
Main Circuit Board
failure.
Wiring failure.
Part replacement.
Blower Motor
malfunction.
Blower Motor stopped. Hall IC failure.
Explanation 2
Poor screw fastening
Explanation 3
Part replacement.
Correction.
E-7 is displayed and the
heater is extinguished.
Room temp. became
higher than 32 °C.
Re-ignite after room
temp. has been lowered.
Move the Heater.
Room Thermistor failure.
Explanation 1
Sunbeams hit the
sensing part of the
Room Thermistor
Part is to be replaced if not within 10.0
kΩ ±5%.