PDS51 Series
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Chapter 6 Diagnose and Troubleshooting
Even in bad weather conditions, the PDS51 solar pump controller will try to drive the
water pump to lift water. To ensure reliable service life, system components must be
protected from factors that can damage equipment. When severe conditions arise, the
controller reduces output if necessary, continues to pump water as long as possible, and
shuts down in extreme conditions. Once the severe condition subsides, the controller will
automatically attempt to resume operation.
If the controller has stopped and an error code is shown on the screen, the delay
depends on the nature of the fault. The number after the letter E corresponds to the error
code.
6.1 Error Codes
Code
Description
Possible Causes
Solutions
E02
Overcurrent
during
acceleration
There is grounding or
short circuit in the output
circuit of the controller
Eliminate peripheral faults and check
whether there is a short circuit at the
motor end
Acceleration time is set
too short
Increase acceleration time
The controller model is
selected improperly
（
with
too small power
）
Select the controller that matches the
motor power and load conditions
E03
Overcurrent
during
deceleration
There is grounding or
short circuit in the output
circuit of the controller
Eliminate peripheral faults and check
whether there is a short circuit at the
motor end
Deceleration time is set
too short
Increase deceleration time
E04
Overcurrent at
constant speed
There is grounding or
short circuit in the output
circuit of the controller
Eliminate peripheral faults and check
whether there is a short circuit at the
motor end
Controller model is too
small
Select the controller that matches the
motor power and load conditions
E05
Overvoltage
during
acceleration
Input voltage is too high
Adjust input voltage to a proper range
Acceleration time is set
too short
Increase acceleration time
No braking unit and
braking resistor installed
Install braking unit and braking resistor
E06
Overvoltage
during
deceleration
Input voltage is too high
Adjust input voltage to a proper range
Deceleration time is set
too short
Increase deceleration time
