Troubleshooting - Geco G-406-P01 User Manual

USER'S MANUAL G-406-P01
9.

TROUBLESHOOTING

Failure symptoms
1. – The display is off
even if G-406-P01 is
connected to the power
supply
2. – Despite turning on
the power the fan won't
work – the display is on
and is showing the
temperature. The circle
is blinking before the
temperature.
3. – Despite turning on
the controller the signal
lamp won't light
4. – The mechanical
temperature limiter has
shut off the fan and
"AL5" alarm has been
activated
5. – Wrong temperature
indications
6. – 'Abnormal',
'strange' behavior of
the unit. Blinking of
horizontal bars, the unit
cannot be turned on
7. - Boiler does not
reach the preset
temperature
PPUH „GECO" Sp. z o.o.
Check:
- if 220V is present across the power supply terminals.
- fuse in the power supply circuit.
- correct connection of the wires to the connection block on PCB.
- correct connection of the ribbon to the display panel.
Check:
- correct connection of the fan wires to the connection block on PCB.
- if mechanical temperature limiter of outlet water temperature indication has
tripped. If sensor or electronics is damaged and the indications are incorrect
this may be the cause of fan not working.
- correct connection of the cables to the fan and if fan starting capacitor (if any)
has not been damaged.
- if fan impeller is not seized and rotates freely.
Check:
- if 220V is present across the power supply terminals.
- fuse in the power supply circuit.
- correct connection of the wires to the connection block on PCB.
- wait until the temperature in the boiler drops
- unscrew the black nut of the temperature limiter located on the left-hand side
of the keypad outside the metal housing
- press the red button
- replace the nut.
Check:
- correct fastening of the sensor.
- sensor cable condition. The cable must not show any damages.
- carefully the appearance of the external surface of the sensor case for any
signs of mechanical damages.
- correct connection of the wires to the connection block on actuator.
Check:
- supply voltage value.
- 220V voltage presence on power cords.
- condition of the power supply connectors.
- tightening of the power supply connectors.
- grounding.
- condition of the electrical installation and number of the units connected to
one phase.
Check:
- the temperature programmed by the user.
- correctness, way and location of installation of the temperature sensor in the
stack.
- boiler and c.h. installation cleanness.
G-406-P01-U-v05a-w01
Check
2005-09-20
PAGE 15