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Heez +050002745 rel. 1.2 - 16.11.2021
ENG
4.
CHECKS BEFORE COMMISSIONING
Before commissioning the unit, check that:
•
the controller’s output current is greater than or equal to the rated or maximum current specified for the
compressor;
•
the working voltage range is correct;
•
the power cables are sized correctly;
•
the cross-section and maximum length of the compressor cables are correct, and that these are connected in
accordance with the wiring diagrams;
•
all of the controller’s inputs are connected correctly.
•
the instructions on installing the individual system components have been followed;
•
the total maximum power of direct current (DC) fans complies with the value shown in the technical specifications
table in all operating conditions. Higher power consumption will cause permanent damage to the controller;
•
if the user terminal is installed inside the cooler cabinet, parameters HIn (terminal inside cabinet) and rIn (Room
temperature when user terminal inside cabinet) are set correctly. See 0300052EN.
4.1
Initial configuration
For further information on the Heez system, see the user manual ( +0300052EN), available on www.carel.com under
“Literature”. Before commissioning, set the initial configuration parameters, shown below and in the parameter table
in the user manual.
4.2
User terminal
Procedure:
50002730_030_R01
300052_034_R01
1. Wait for the standard display to be shown;
2. Press PRG for 3 s: the password prompt is
displayed (PSd)
300052_035_R01
50002730_031_R01
3. Press PRG: UP and DOWN flash
4. Press UP and enter the Service password: 22
