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Owner's Manual
Section 10: OPERATION & ADJUSTMENT OF THE DIGITAL CONTROLLER
Caution: Alteration of the Digital Controllers programming & settings without authorisation from
Quantum Energy Technologies will void your warranty. This section is provided ONLY for qualified
refrigeration technicians to assist in servicing, repairs or trouble shooting.
10a: The Buttons
Use In Conjunction With The Layout Diagram Fig: 5 And Wiring Diagrams Fig: 6&7.
10a.1: SET BUTTON
a) To enter the settings node, press the SET button 3 times; the display will show H55, this is the
water temperature cut out set point. Pressing the UP or DOWN button will adjust the set point
from 10℃ to a maximum setting of 62℃ (factory setting 55℃).
b) Press & hold for 6 seconds to enter the de-icing mode. If display shows "OFF" press & hold for
another 6 seconds to exit this mode. (Note this may cause system malfunction so avoid using).
c) Pressing the SET button (hold for 6 seconds) will perform a manual reset of the system if
required i.e. after a 105℃ Thermal Trip. Turning power off to the system, them back on will
also reset it.
10a.2: UP BUTTON
a) This key becomes operational after entering the settings mode above.
b) Press 3 times to display Axx (the compressor temperature). Push again to display bxx
(evaporator temperature) or again for Cxx (ambient temperature).
c) During the time delay start period, press & hold for 3 seconds to force a compressor start. When
the compressor is running, press & hold for 3 seconds to force a compressor shutdown.
10a.3: DOWN BUTTON
a) This key becomes operational after entering the settings mode above.
b) Press & hold for 3 seconds to simultaneously open the de-ice valve and liquid injection valve;
the valves will close 10 seconds later.
c) When compressor is running, press 3 times to display the Amperage being drawn Cxx.
10b: Programming Menu
To restore the digital controllers factory settings, press the SET button and hold while turning the
power onto the system.
To exit any level press the SET button to cycle through all menu items until the controller returns to
the water temperature display once again.
Document number: QDC0030PD-11
Quantum Energy Technologies
Page 25 of 40
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