BTH ULTRA Electric Boilers
USE & CARE MANUAL
(Revision April 2011)
, Page
22.
Section 7- TROUBLE SHOOTING
7.1 TROUBLE SHOOTING TABLE
PROBLEM
CAUSES
SOLUTION
The display shows
---
in
“TARGET
TEMP
”
-There is no heating demand
when the outdoor sensor
is used and the icon is
shown, the outside temperature
is above the boiler shut down
setting.
-The switch located on the back
of the controller is set to
“Bi-
Energ
” and the icon
is
shown.
-Generate a heat demand
-Temporarily increase the value of this
setting on the controller configuration.
-Set the switch to
“Elect”
The display shows
“Er1”
and the
icon
is displayed.
The controller is not detecting the
presence of the outdoor sensor.
-Make sure that the sensor cable
connected to the unit is not in short or
open circuit. Do not install a jumper
between S1-S1 when the sensor is
not required.
-Check the resistance value (ohms) of
the sensor. It should correspond to the
value shown on the table below
otherwise it should be replaced.
Check for proper connection of the
wires inside the boiler connected to
S1S1 and at the controller terminals.
The display shows
“Er2” and blinks
The circuit of the temperature
sensor corresponding to the
displayed information is open.
-Select the appropriate heating mode
(modes 2,3,5&5 require an additional
sensor)
-Make sure that the required sensor is
properly connected to corresponding
terminals and that the cable used is
not damaged.
Stage 2 is ON but not Stage 1
There is no problem. A rotation
of the stages is provided to allow
an equal time of operation of the
stages
The boiler water temperature at the
outlet of the unit
“BOIL OUT” does
not get to the
“BOIL TARGET”
temperature.
-The room thermostat is not in
constant demand.
-Some heating elements are
defective
-The heating distribution system
is using the total capacity of the
boiler at an equilibrium
temperature lower than the boiler
target temperature
-Adjust the thermostat anticipator (If
available) to obtain longer operating
cycles
-Replace defective elements
-If a higher boiler water temperature is
required to satisfy the heat demands
of the thermostats, a boiler having a
larger capacity is required.
Boiler stays in demand even when
the thermostat is not in demand.
(Systems with
only one
thermostat)
The electronic thermostat used is
not fully compatible with the
boiler.
Add a 1000ohms x 1 watt resistor in
parallel with the demand circuit and
the common. We can provide (at no
cost) a kit with required material.
-Replace existing thermostat with a
model having a dry contact so that no
current can leak to the boiler controller
Boiler stays in demand even when
-On systems with electric zone
-Change defective
“end switch”.
