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EWWP045~06 ECB1~3MUW

Packaged water-cooled water chillers

4PW30041-1A

Operation manual

Resetting warnings

During normal operation, the display of the controller may start
flashing, alternately showing the inlet water temperature and the
following warning code:

■

: indicates that the compressor1 requires maintenance: the

total running hours of the compressor1 (direct parameter

)

has exceeded the setting of the timer threshold for
maintenance warning (user parameter

■

: indicates that the compressor2 requires maintenance: the

total running hours of the compressor2 (direct parameter

)

has exceeded the setting of the timer threshold for
maintenance warning (user parameter

To reset the maintenance warning

, proceed as follows:

Enter the list of direct parameters by pressing the

key for

approximately 5 seconds.

The parameter code

appears on the display.

Select parameter code

using the

and/or

key.

Press the

key to switch to the parameter value.

Press the

and

keys simultaneously for approximately

5 seconds.

The timer's value becomes

Press the

key to return to parameter code

Press the

key to return to normal operation.

Advanced features of the digital controller

This chapter gives an overview of the direct parameters and user
parameters provided by the controller. In the following chapter, you
will learn how you can set up and configure the unit using these
parameters.

Overview of the direct parameters

The list of direct parameters is accessible by pressing the

key for

approximately 5 seconds.

When scrolling through the list of direct parameters using the

and/

key, the parameters appear in the following order:

■

: to define the cooling temperature setpoint,

■

: to define the cooling temperature difference,

■

: to define the heating temperature setpoint,

■

: to define the heating temperature difference,

■

: to check the evaporator outlet water temperature,

■

: when cooling mode is active: inlet water temperature of the

condenser,
when heating mode is active: inlet water temperature of the
evaporator,

■

: to check the total running hours of the compressor1,

■

: to check the total running hours of the compressor2,

■

: to check the total running hours of the pump.

Overview of the user parameters

The list of user parameters is only accessible by means of the user
password. When scrolling through the list of parameters using the

and/or

key, you see the direct parameters and user parameters.

The user parameters appear in the following order:

■

: to define the measurement unit (°C or °F),

■

: to define the time delay between the pump startup and the

compressor startup,

■

: to define the time delay between the unit shutdown and the

pump shutdown,

■

: to define the time threshold for maintenance warning,

■

: to disable the buzzer or to define the activation period of the

buzzer in case of an alarm,

■

: to activate or to deactivate the remote cool/heat control,

■

: to activate or de-activate the remote on/off control,

■

: to lock or unlock the controller keyboard,

■

: to define the unit's serial address,

■

: not used.

Tasks carried out using direct parameters

Entering the list of direct parameters

Press the

key for approximately 5 seconds.

The controller enters the list of direct parameters, displaying
parameter code

Defining the cooling temperature difference

To control the cooling load, the unit is equipped with a two-step
thermostat. The thermostat's "cooling temperature difference" can
be modified by means of direct parameter

The default, limit and step values are:

■

Default value

°C

■

Limit values

°C

■

Step value

°C

To define the cooling temperature difference, proceed as follows:

Enter the list of direct parameters.