Led Indicators; Switch Function Keys; Manual/Automatic Operation; Forced Mode 'High' (H - REMEHA Gas 310 ECO Technical Information

11.1.2 LED indicators

The instrument panel has 4 indicating LED's with the fol-
lowing functions:
- The LED above the [-] key (in the h symbol); when
illuminated green confirms the boiler is in manual
override (see section 11.2).
- The LED above the [e] key indicates that "24 hour
pump operation" has activated the heating pump (and
the shunt pump if required).
- The LED above the [+] key flashes if the optional
hydraulic pressure sensor detects that the water pres-
sure is too low.
- The LED above the [s] key flashes if there is no
communication with the code key (codekey not con-
nected).
- Two LED's flash green when there is no communica-
tion anymore between codekey and control unit. The
boiler will keep on operating. Only after the power
supply was switched off and back on, the boiler will
refuse to operate.

11.2 Switch function keys

Some keys on the instrument panel have dual functions,
i.e. a programming and a switch function.
The programming function is described in section 13.
The switch function (on or off) is activated by pressing
down the relevant key for 2 seconds. Whether the func-
tion is switched on or off is indicated by the indicator for
the key, which is either lit or not lit, or by the appearance
of a letter in the code window.

11.2.1 Manual/automatic operation

If the [-] key is pressed for 2 seconds the boiler will
switch on, even if there is no heat demand from an
external control. The green LED above the key is on
continuously to indicate manual heat demand (central
heating bridged internally). When the [-] key is pressed
for 2 seconds again the boiler will return to automatic
central heating operation (green LED off).
i During manual operation the flow temperature
cannot exceed its pre-set maximum value. This is to
protect the boiler and the system. Parameters can be
changed during manual operation.
Important!!
g
not connected to the control unit, the pump will not be
switched.

11.2.2 Forced mode 'high' (h [[)

By pressing the m and [+]-key simultaneously in oper-
ating mode during 2 seconds, the boiler will run at
maximum power. The letter h will now appear on the
display. To protect the boiler and the system, the flow
temperature cannot exceed its pre-set maximum value.
This is. Parameters can be changed in this mode.
By pressing the [+]- and [-]-keys simultaneously, the
boiler will return to operating mode.
62560.indd 33 62560.indd 33
If an external heating pump is
Following a manual override the boiler will return to nor-
mal (auto control) if no keys are used within a 15-minute
period.

11.2.3 Forced mode 'low' (l [[)

By pressing the m and [-]-key simultaneously in operat-
ing mode, the boiler will run at minimum power. The
letter l will now appear on the display. To protect the
boiler and the system, the flow temperature cannot
exceed its pre-set maximum value. This is. Parameters
can be changed in this mode.
By pressing the [+]- and [-]-keys simultaneously, the
boiler will return to operating mode.
Following a manual override the boiler will return to nor-
mal (auto control) if no keys are used within a 15-minute
period.

11.3 Display of values

The display has only two digits available therefore val-
ues over this are displayed as follows:
- values from 00 to 99 will be indicated without any
punctuation marks
- values from 100 to 199 will be indicated by a dot
between both digits e.g. )0 = 100, !0 = 110,
(9 = 199
- values from 200 to 299 will be indicated by a dot
behind every digit e.g. )) = for 200, !) = 210,
(( = 299
- values over 300 will be indicated by showing the
thousands, hundreds, tens and units in separate alter-
nating pairs. (see section 12.2 and 12.5)
- negative values (for instance when using an external
sensor or when sensors are not connected) will be
indicated by a dot behind the last digit, e.g.
indicates -10.
33
1)
18-6-2009 13:14:58 18-6-2009 13:14:58