SECTION 10
TROUBLE SHOOTING CONTROLS
AUTO SENTRY ES CONTROLLER
DISPLAY MODES
The normal display indicates the package service pressure, the airend discharge, the total running hours, and one
of the following operating modes, The green light will be on for any operating mode, whether the compressor is run-
ning or not.
READY
The compressor has been stopped by pressing the [STOP/RESET] key.
CON
The compressor is operating in the Constant Run mode.
LDM
The compressor is operating in the Low Demand mode.
AUTO
The compressor is operating in the Automatic mode.
SEQ n
The compressor is operating in the sequence mode.
The following alternate displays may be called by pressing a cursor [<] or [>] key
SYS PRES
The pressure at the service connection
RES PRES
The pressure in the oil reservoir
DIF PRES
The pressure drop across the air/oil separator
TOT HRS
The total hour of compressor running
DIS TMP
The temperature at the airend discharge
RES TMP
The temperature in the reservoir/ separator
BD TMR
The time remaining before a blowdown will be allowed
(Low Demand, Auto, Sequence Modes)
AUTO TMR
The time remaining of unloaded motor operation
(Auto, Sequence Modes)
ADVISORY TROUBLESHOOTING GUIDE
All advisories are indicated on the keypad by a yellow indicator in the Status area, and one of the following messages
alternating with the normal lower line display. Perform service or maintenance as indicated, then clear the advisory
as instructed in Section 4.
Message
Action Needed
CHNG AIR FILTER
Excessive vacuum has been detected after the air filter, indicating it has
become full. Change the air filter to ensure maximum air delivery.
CHNG SEPARATOR
The differential pressure across the air/oil separator has risen to over 8
psid. Change the separator to ensure maximum performance.
CHNG OIL FILTER
The unit has been operated for the programmed number of hours since
the last filter replacement, Change the filter to ensure an adequate flow
of lubricant.
CHANGE OIL
The unit has been operated for the programmed number of hours since
the last oil change. If high operating temperatures are encountered, the
“AUTO SENTRY-ES controller will automatically adjust the time interval
for the change oil advisory. Change the oil to ensure lubricant quality.
13-9/10-641 Page 61
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