KEY UMS-4PS, Руководство по эксплуатации

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3.4 Switching (WINTER/SUMMER) working modes of the unit manually [co C].
The parameter enables the user to switch the regulator manually between the
WINTER/SUMMER working modes. The switching occurs after pressing the OK
button. The notice [co C] means WINTER mode, whereas [co -] – SUMMER mode.
CAUTION! Any attempts of switching controller’s working modes manually might
result in failure if it is the outside temperature that forces the switching automatically
(e.g. an attempt of turning on the SUMMER mode at the outside temperature below
zero).
3.5 Temperature threshold [LL10] / [LH18].
In order to eliminate the influence of the frequent changes in outside temperature on
the work of the UMS-4PS controller, a possibility of programming the threshold
temperatures for changing to WINTER mode ([LL10]) and SUMMER mode ([LH18])
has been implemented. Changing between these mode is automatic after the outside
temperature exceedes one of the threshold temperatures. The changes of threshold
temperatures are made in the same way as programming night inside temperature
decrease.
CAUTION! When the outside temperature sensor is out of order, the controller does
not switch the WINTER/SUMMER modes automatically. However, the switch between
the modes can be made manually.
3.6 Temperature sensors damage.
The regulator tests functioning of measuring channels continually. In case of detecting
a damage, the coded alarm is displayed, and the regulator starts to operate. The list of
alarm codes and the description of regulator reaction is shown in table 2. In an
emergency, one has to turn off the regulator, connect power to central heating pump
permanently, open the mixing valve manually and contact technical staff.
Table 2. The list of alarm codes and responses from the control unit.
Code Description Controller's response
E 2 Central heating sensor
failure
The mixing valve is open after selecting the WINTER
mode. Temperature decreasing and central heating
installation turn-off option are not available.
E 4 Outside temperature
sensor failure
No automatic switching between WINTER/SUMMER
working modes. 0°C outside temperature is taken
into account when programming the central heating
temperature.
CAUTION! When damaging the outside temperature sensor and the central heating
temperature sensor occurs at the same time, the regulator will display the [E 6] alarm.
4. Default settings.
To restore service mode, press and hold the (*) button for about 3 sec. It is possible to
check the parameters using the (+, -) buttons. After selecting a desired parameter,
press the OK button to enter the operation mode signalled by blinking of the selected