Pump controller error codes
All eight HYDROSET PM821 fault codes, with the cause and the fix from the manual.
A pump controller error code is a two-character code that flashes on the display and stops the pump. HYDROSET PM821 has eight codes, E1 to E8. Each code has one defined cause, and the steps to clear it are in the table below and on that code's own page.
| Code | Fault | Page |
|---|---|---|
| E1 | Over current | Cause and fix |
| E2 | Load missing | Cause and fix |
| E3 | Dry running | Cause and fix |
| E4 | Low pressure | Cause and fix |
| E5 | Cycling error | Cause and fix |
| E6 | Pressure sensor | Cause and fix |
| E7 | Temperature sensor | Cause and fix |
| E8 | Over temperature | Cause and fix |
To clear a fault, press the Cancel key on the main screen.
Which model is right for the pump?
Several HYDROSET PM821 faults appear when the unit's rating does not match the pump's nameplate current. The table below gives the right model for each pump current.
Frequently asked questions
How is a fault cleared?
To clear a fault, press the Cancel key on the main screen.
How many fault codes does HYDROSET PM821 have?
HYDROSET PM821 has eight fault codes, E1 to E8. Seven are documented in the manual; E5 is printed on the enclosure but the manual for hardware A3.3 / software 4.0 carries no description for it.
Which faults clear by themselves?
E3 and E4 clear by themselves once the water returns; the unit retries every F6 minutes. E8 clears by itself once the unit has cooled.
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