GRE AR20753, Installation And Maintenance Manual

Page: 6 / 44

6
ENGLISH
PROBLEMS
PROBLEMS ORIGIN SOLUTIONS
Green Light does not light.
Electric supply is
not working.
Led is fused.
Check and fix the electric
supply if necessary.
Check and replace the led
if necessary.
Amber led is lighten (alarm). Thermostat is
damaged.
Replace or fix the
thermostat, then restart the
heater.
If alter restarting the amber
light keeps shining or we
are not able to restart then
the security switch is
damaged and must be
replaced.
Red led shines at 1 to 2 minutes
intervals.
Low water flow
or
air in the
system.
Backwash the filter to
restore flow.
Fix unusual air entry.
Resistances do not work with
amber Light off.
Thermostat is
impaired.
Resistances
are
out of order.
Check and replace if
necessary.
Check resistance between
two poles of resistance
fork
48Ω for 3Kw
25Ω for 6Kw
16Ω for 9Kw
12Ω for 12Kw
22Ω for 18Kw
Replace resistances if thy
do not reach those values.
Flow switch not
working properly. Check flow switch
operation.
Check for continuity with
paddle pushed. Replace if
necessary.
ARS out of order. Check with continuously
activated (not intermittent)
flow switch, after 1,5
minutes, the resistances are
not turned on. If flow
switch is working properly
then replace ARS.