PD20Series
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Chapter 5 Diagnostics and Troubleshooting
The PDS23Plus solar pump controller will attempt to drive the pump to deliver
water even under adverse conditions. To ensure years of reliable service, it must also
protect the system components from conditions that might result in equipment
damage. When adverse conditions arise, the controller will continue to deliver as
much water as possible at reduced output if necessary, and will shut down only in
extreme cases. Full operation will resume automatically whenever abnormal
conditions subside.
If the controller has stopped to indicate a fault code on the display, the associated
time-out delay will vary depending on the nature of the fault. The number following
the “E” symbol corresponds to the error code for the offending condition.
5.1 Fault Codes
Fault code Fault description
Possible causes
Remedy
E001
IGBT module
fault
Too short acceleration time
Increase acceleration time
Damaged IGBT module
Ask for support
Malfunction caused by
interference
Inspect external
equipment and eliminate
interference
Improperly grounding
Check grounding wire
E002
Over-current
during
acceleration
Too fast acceleration
Increase acceleration time
Too low input voltage
Check the input power
supply or wiring
Lower-rating controller
Replace with higher-rating
controller
