AIM Manual

Electronic Maintenance » Electronic Controls (Page 68)

SubDrive/MonoDrive Troubleshooting (Continued)

SubDrive15, 20, 30, MonoDrive, and MonoDriveXT (NEMA 3R)

Troubleshooting
ConditionIndicator LightPOSSIBLE CAUSECORRECTIVE ACTION
NO WATERNONE- No supply voltage present
- Display board cable disconnected or loose
- Verify cable connection between main control board and display board
- If correct voltage is present, replace drive
GREEN "---"
ON DISPLAY
- Pressure sensor circuit- Verify water pressure is below system set point
- If Pressure Input Board break-away tab is removed, ensure auxiliary device is connected and closed circuit
- If Pressure Input Board break-away tab is removed and no auxiliary device is being used, manually short-circuit "AUX IN" connections
- Jumper wires together at pressure sensor; if pump starts, replace sensor
- If pump doesn’t start, check sensor connection at Pressure Input Board;. if loose, repair
- If pump doesn’t start, jumper sensor connection at Pressure Input Board. If pump starts, replace wire
- If pump doesn’t start with sensor Pressure Input Board connection jumpered, replace Pressure Input Board
- If pump doesn't start with new Pressure Input Board, replace drive
RED FAULT CODE ON DISPLAY- Fault detected- Proceed to fault code description and remedy
GREEN MOTOR
FREQUENCY
ON DISPLAY
- Drive and motor are operating
- Loose switch or cable connection
- Incorrect motor or pump settings
- Motor may be running backwards
- Gulping water at pump inlet
- Verify Maximum Frequency setting. If this setting was reduced below maximum value, increase
- Verify motor/pump ratings and match to motor/pump settings on drive (DIP switch or Wi-Fi) - Verify motor connections
- Frequency max, amps low, check for closed valve, or stuck check valve - Frequency max, amps high, check for hole in pipe
- Frequency max, amps erratic, check pump operation, dragging impellers
- This is not a drive problem
- Check all connections
- Disconnect power and allow well to recover for short time, then retry
PRESSURE
FLUCTUATIONS
(POOR REGULATION)
GREEN MOTOR
FREQUENCY
ON DISPLAY
- Pressure sensor placement and setting
- Pressure gauge placement
- Pressure tank size and pre-charge
- Leak in system
- Air entrainment into pump intake (lack of submergence)
- Correct pressure and placement as necessary
- Tank may be too small for system flow
- This is not a drive problem
- Disconnect power and check pressure gauge for pressure drop
- Change tank size configuration
- Set deeper in the well or tank; install a flow sleeve with airtight seal around drop pipe and cable
- If fluctuation is only on branches before sensor, enable Steady Flow
RUN ON WON’T
SHUT DOWN
GREEN MOTOR
FREQUENCY
ON DISPLAY
- Pressure sensor placement and setting
- Tank pre-charge pressure
- Impeller damage
- Leaky system
- Sized improperly (pump can’t build enough head)
- Check frequency at low flows, pressure setting may be too close to pump max head
- Verify precharge at 70% if tank size is larger than minimum, increase precharge (up to 85%)
- Verify that the system will build and hold pressure
- Enable bump and/or aggressive bump
- Increase minimum frequency
RUNS BUT TRIPSFLASHING RED- Check fault code and see corrective action- Proceed to fault code description and remedy on reverse side