Alarm Condition Display - nVent Hoffman SpectraCool Slim Fit Instruction Manual

ALARM CONDITION DISPLAY

There are eleven possible on-latching alarm conditions detectable by the controller that are indicated on the
controller display. All alarms can also be accessed through the Ethernet and USB connections with the optional
remote access communication board.
Alarm
Mnemonic
tP General Alarm
LA High Pressure Warning
LP Low Pressure Alarm
Air Inlet Temperature Sensor
E1
Air Outlet Temperature Sensor
E2
High Temperature Alarm
Ht
Default = 55°C
Low Temperature Alarm
Lt
Default = 14°C
A1
HP/HP1 High Pressure Serious Alarm
LC Lost Communication Alarm
LC1 Lost Communication Alarm
NOTE 1: Air inlet temperature sensor will default to air outlet temperature sensor. Cooling setpoint defaults to 10°C.
NOTE 2: Unit continues to operate without evaporator freeze protection.
NOTE 3: The MALF high pressure switch is optional.
NOTE 4: The Low pressure switch is optional.
NOTE 5: The High Pressure (HP) or High Pressure Serious (HP1) switch is optional.
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Description
Alarm
Alarm
Air inlet temperature greater
Air inlet temperature less than
Frost Alarm
communicate with the Master
communicate with one of the
Cause
Door open and/or smoke
detected
MALF high pressure switch
opens (See Note 3 below)
Low pressure switch open
(see note 4 below)
Sensor Failure
Sensor Failure
than 55°C
14°C
Air outlet temperature less
than or equal to -1.0°C
High pressure switch open
(see note 5 below)
The Master cannot
communicate with any
Slave, or the Slave cannot
The Master cannot
Slaves
Result
Unit turns off for
duration of alarm
No effect on function
No effect on function
See Note 1 below
See Note 2 below
No effect on function
No effect on function
Compressor and
Condenser fan off
for duration of alarm
Unit turns OFF for
duration of alarm
No effect on
function. Unit will
enter standalone
mode
No effect on
function. Unit will
enter standalone
mode
Alarm Relay
Relay Contact
Closed
N/A
Relay Contact
Closed
Relay Contact
Closed
Relay Contact
Closed
Relay Contact
Closed
Relay Contact
Closed
Relay Contact
Closed
Relay Contact
Closed
N/A
N/A
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