Gardner Denver RNC Series, Instruction Manual

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Troubleshooting guide
I-Controller Level 3
VFTD READINg
(Fault conditions) POSSIBlE CAuSE(S) CORRECTIVE ACTION
ALERT AMBIENT TEMP
(High Ambient Air Temperature)
1. Poor ventilation Ensure ventilation is adequate for heat load
Ensure compressor is not ventilated toward dryer
ALERT INLET AIR TEMP
(High Inlet Air Temperature)
1. No aftercooler on compressor
2. Dirty aftercooler
3. Poor Ventilation Install an aftercooler
Clean aftercooler
Ensure ventilation is adequate for heat load
ALARM DEW POINT TEMP
(High Dew Point Temperature)
1. Refrigerant leak
2. System Overload
3. Dirty Condenser Have serviced by a qualified refrigeration technician
Review ambient, inlet, and air flow conditions
Blow dust out of condenser fins
SHUTDOWN LOW PRESSURE
(Low Compressor Suction
Pressure)
1. Low ambient condition
2. Refrigerant leak
3. Improper Hot Gas Bypass Valve
setting
Elevate ambient temperature
Have serviced by a qualified refrigeration technician
Properly adjust HGBV
SHUTDOWN HIGH PRESSURE
(High Compressor Discharge
Pressure)
1. Fan(s) not working
2. High ambient condition
3. System overload
Check condenser fan function
Ensure ventilation is adequate for heat load
Ensure compressor is not ventilated toward dryer
Review ambient, inlet, and air flow conditions
SHUTDOWN MOTOR PROTECT
(Compressor Motor Overload)
1. Motor overloads triggered
2. Refrigerant leak Check voltage. Check for short to ground
Have serviced by a qualified refrigeration technician
ALERT MAINTENANCE
1. Pre-set Maintenance interval Blow dust out of condensers, verify drain function,
check pressure drop across dryer
ALARM DRAIN
(Failure to Drain Condensate)
1. Failure to discharge
condensate
Check automatic discharge line for closed hand
valve or kink in hose
Clean and rebuild drain valve
Verify power to valve with Push-to-Test button
I-CONTROllER lEVEl 3
Alert/Alarm Condition Indicators
TABlE 2
I-Controller Level 3 Alert/Alarm Fault Status Indicator Guide
Text Window Fault Condition Panel Lights Process Diagram LEDs* Audible Alarm (1)
Fault
Notification
LCD text
Event
Identification
See Troubleshooting Section
Alarm
Red
Alert /
Maintenance
Yellow
Compressor
Green
Thermometer
Green
Gauge
Red
Separator /Filter
Drain
Green
Contacts N/O
Alarmed
Contacts N/C
Normal
ALERT AMBIENT TEMP High Ambient Air Temperature - Flashes ON/OFF Flashes - - - N/C
ALERT INLET AIR TEMP High Inlet Air Temperature - Flashes ON/OFF Flashes - - - N/C
ALARM DEW POINT TEMP High Dew Point Temperature Flashes - ON Flashes - - N/O N/C
SHUTDOWN LOW PRESSURE Low Compressor Suction Pressure Flashes - OFF - Flashes - N/O (2) N/C
SHUTDOWN HIGH PRESSURE High Compressor Discharge Pressure Flashes - OFF - Flashes - N/O (2) N/C
SHUTDOWN MOTOR PROTECT Compressor Motor Overload Flashes - OFF - - - N/O (2) N/C
ALERT MAINTENANCE Perform Standard Maintenance Reminder - Flashes ON - - - N/C
ALARM DRAIN Failure to Drain Condensate Flashes - ON - - Flashes N/O N/C N/C
* During an Alert/Alarm condition, the Process Diagram LED rotation ceases. The Fault based LED will “Flash” until the fault condition is resolved.
(1) Depress the (RESET) button to silence the Audible Alarm. The Fault Condition will remain visible in the VFTD text window until corrected.
(2) The Refrigeration Compressor will remain “”OFF”” until the fault condition is corrected.