Champion CRN Series Instruction Manual page 17

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