EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- info@ewccontrols.com
7
HK2000
LED’s
The HK2000 is equipped with 7 LED’s which indicate system operation and status. Familiarize
yourself with the LED’s definitions, in order to quickly determine the system status and mode of
operation.
ECONOMY
RED
FAN
RED
COMPRESSOR
RED
COOLING CALL
RED
OA TEMP MODE
GREEN
FRESH AIR MODE
GREEN
ENTHALPY MODE
GREEN
Economy LED illuminates when panel has activated all dampers to the Outside Air Mode,
Fresh Air Mode, Enthalpy Mode, or Mechanical Assistance Mode.
Compressor LED illuminates when panel has activated the Mechanical Cooling or
Mechanical Cooling Assistance.
Fan LED illuminates when the panel has activated the Indoor Fan Blower.
Flashes in unison with Fresh Air & Enthalpy LED’s to indicate System Status. Illuminates
when Outside Air Temperature is suitable for Economy Operations.
Flashes in unison with Outside Air & Enthalpy LED’s to indicate System Status.
Illuminates when a scheduled Fresh Air Cycle is active.
Flashes in unison with the Outside Air & Fresh Air LED’s to indicate System Status.
Illuminates when the Enthalpy control or other external device has closed it’s
contacts.
Cooling Call LED illuminates when the panel detects a cooling demand from the
Thermostat.
NOTE:
It is possible to observe both the Economy LED and the Compressor LED illuminated at the same time.
EXAMPLE 1:
A call for cooling has occurred but outdoor conditions are not suitable to satisfy the demand, so the
compressor is activated and the Compressor LED illuminates. The Fresh Air Cycle Schedule activates the dampers to
the Fresh Air Mode to satisfy fresh air requirements, so the Economy LED will also illuminate.
EXAMPLE 2:
A call for cooling has occurred but outdoor conditions are not suitable to satisfy the demand, so the
compressor is activated and the Compressor LED illuminates. The Mechanical Assistance Feature activates the
dampers to the Fresh Air Mode to assist the compressor, so the Economy LED will also illuminate.
A Return and Outdoor Air Sensor is required in order to utilize the Mechanical Cooling Assistance Feature.
The Fresh Air Cycle Schedule operates independent of all other functions, and regardless of outside temperatures.
EC
ON
OM
Y
FA
N
CO
MP
RE
SS
OR
CO
OLI
NG
C
ALL
OA
TE
MP
M
OD
E
FR
ES
H A
IR M
OD
E
EN
TH
ALP
Y M
OD
E
ON
OFF
ON
ON
OFF OFF OFF
ON
ON
ON
OFF
OFF OFF ON
ON
ON
ON
OFF
OFF
OFF ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
MECH. ASSISTED COOLING
MECH. COOLING CALL
ENTHALPY MODE
OUTSIDE AIR MODE
FRESH AIR MODE
BASIC MODE LED INDICATIONS
