3-12
T-294-01
Code
No.
DESCRIPTION
TITLE
AL54
Primary Supply Air
Sensor Failure
(STS)
Alarm 54 is activated by an invalid primary supply sensor reading that is sensed
outside the range of --50 to +70
_
C (--58
_
F to +158
_
F) or if the probe check logic
has determined there is a fault with this sensor. If Alarm 54 is activated and the
primary supply is the control sensor, the secondary supply sensor will be used for
control if the unit is so equipped. If the unit does not have a secondary supply
probe, and AL54 is activated, the (primary return sensor, minus 2
_
C) will be used
for control.
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm (refer to section 3.2.1).
AL55 DataCORDER
Failure
This alarm has been activated to indicate the DataCORDER has been disabled
due to internal failure. To clear this alarm, simply reconfigure the unit to its OEM
model number by using the multi-configuration card.
AL56
Primary Return Air
Sensor Failure
(RTS)
Alarm 56 is activated by an invalid primary return sensor reading that is outside
the range of --50 to +70
_
C (--58
_
F to +158
_
F). If Alarm 56 is activated and the
primary return is the control sensor, the secondary return sensor will be used for
control if the unit is so equipped. If the unit is not equipped with a secondary
return sensor or it fails, the primary supply sensor will be used for control.
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm (refer to section 3.2.1).
AL57
Ambient
Temperature Sensor
Failure (AMBS)
Alarm 57 is triggered by an ambient temperature reading outside the valid range
from --50
_
C (--58
_
F) to +70
_
C (+158
_
F).
AL58
Compressor High
Pressure Safety
(HPS)
Alarm 58 is triggered when the compressor high discharge pressure safety switch
(HPS) remains open for at least one minute. This alarm will remain active until
the pressure switch resets, at which time the compressor will restart.
AL59
Heat Termination
Thermostat (HTT)
Safety
Alarm 59 is triggered by the opening of the heat termination thermostat (HTT)
and will result in the disabling of the heater. This alarm will remain active until the
thermostat resets.
AL60
Defrost Termination
Sensor Failure
(DTS)
Alarm 60 is an indication of a probable failure of the defrost termination sensor
(DTS). It is triggered by the opening of the heat termination thermostat (HTT) or
the failure of the DTS to go above 25.6
_
C (78
_
F) within two hours of defrost
initiation. After one-half hour with a frozen range set point, or one-half hour of
continuous compressor run time, if the return air falls below 7
_
C (45
_
F), the
Controller checks to ensure defrost termination sensor (DTS) has dropped to
10
_
C or below. If not, a DTS failure alarm is given and the defrost mode is
operated off of return temperature sensor (RTS). The defrost mode will be
terminated after one hour by the Controller.
AL61 Heaters Failure
Alarm 61 is the heater alarm caused by detection of improper amperage resulting
from heater activation (deactivation). Each phase of the power source is checked
for proper amperage.This alarm is a display alarm with no resulting failure action,
and will be reset by a proper amp draw of the heater.
AL62 Compressor Circuit
Failure
Alarm 62 is triggered by improper current draw increase (or decrease) resulting
from compressor turn on (or off). The compressor is expected to draw a
minimum of 2 amps; failure to do so will activate the alarm.This is a display alarm
with no associated failure action and will be reset by a proper amp draw of the
compressor.
AL63 Current Over Limit
Alarm 63 is triggered by the current limiting system. If the compressor is ON and
current limiting procedures cannot maintain a current level below the user
selected limit, the current limit alarm is activated.This alarm is a display alarm
and is inactivated by power cycling the unit, changing the current limit via the
code select Cd32, or if the stepper motor suction modulation valve (SMV) is
allowed to open to 100%.
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