Heatcraft Refrigeration Products H-IM-79E Refrigerator User Manual


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19
ErrorIndicator
Air Defrost fan motors must be wired through the fan
relay on the Beacon II board for this to be effective on Air
Defrost systems. The entire system will be shut off and
remain off until the SPST switch is opened.
Air Defrost evaporator fans are setup to run constantly.
If there is a need to shut down the evaporator fans on
an Air Defrost system, this can be accomplished by
wiring the evaporator fan motor or evaporator fan motor
contactor through the fan relay on the Beacon II board.
When this is done and the Air Defrost system
is placed in “SERVICE,” the evaporator fans
will shut off when the system is in pumpdown.
ERRORCODES
E1 - Room temperature sensor shorted,
open or not installed
E2 - Defrost temperature sensor shorted,
open or not installed
E3 - Suction temperature sensor shorted,
open or not installed
E4 - Suction pressure transducer shorted,
open or not installed
E5 - Outdoor temperature sensor shorted
E6 - Low superheat
E7 - Compressor shut down
(high or low pressure switch open or
oil pressure switch open)
E9 - Multi-in/multi-out wiring error
ErrorIndicatorLed
At initial power up, each Beacon II board checks for
system errors. The system error check involves checking
the various temperature sensors to determine whether
any of these sensors are shorted or open.
The system will pumpdown and cycle off and willnot
restartuntil the fault is cleared or the circuit breaker
reset, for the following conditions:
- Suction sensor shorted, open
or not installed
- Room temperature sensor shorted
or not installed
- Pressure Transducer open
or not installed
The system will pumpdown, cycle off and trytorestart
forthesefaults. Each try will be after the 4 minutes
“Hold Off” period, for the following fault conditions:
- High pressure or low pressure cutout
- Oil pressure
After the fourth try, the Alarm contacts will be closed
and an alarm message displayed on the LED. To clear
this condition, the system should be cycled through the
“SERVICEMODE” after the correction is completed.
EvaporatorFansShutOff
In some installations, it is desirable to shut off the
evaporator fans periodically. This is easily accomplished
on Beacon II by wiring a single pole, single throw switch
(SPST) between the terminals marked “SERVICE” and
“COM” on the Beacon II board. Closing this switch will
cause the system to pumpdown and shut off.
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