Zapi DUALACE2 NEW GENERATION User Manual

Page 132/169 AFNZPxxx – DUALACE2 NEW GENERATION – User Manual
Troubleshooting:
Check both the electric and the mechanical functionality of the encoder.
Check the wires crimping.
Check the mechanical installation of the encoder, if the encoder slips inside its
housing it may raise this alarm.
The electromagnetic noise on the sensor can be a cause for the alarm. In this
case try to replace the encoder.
If the problem is still present after replacing the encoder, the failure is in the
controller. Replace it.
EPS RELAY OPEN (MDI/LED code = 70)
Cause:
The controller receives from EPS information about the safety contacts being
open.
Troubleshooting:
Verify the EPS functionality.
PUMP INC START (MDI/LED code = 79)
Cause:
Man-presence switch is not enabled at pump request.
Troubleshooting:
- Check wirings.
- Check microswitches for failures.
- Through the TESTER function, check the states of the inputs are
coherent with microswitches states.
- If the problem is not solved, replace the logic board.
EVP COIL OPEN (MDI/LED code = 9)
Cause:
No load is connected between the NEVP output (pin A23) and the electrovalve
positive terminal.
Troubleshooting:
Check the EVP condition.
Check the EVP wiring.
If the problem is not solved, replace the logic board.
EVP DRIV. SHORT. (MDI/LED code = 9)
Cause
The EVP driver (output NEVP, pin A23) is shorted.
The microcontroller detects a mismatch between the valve set-point and the
feedback of the EVP output.
Troubleshooting
Check if there is a short circuit or a low-impedance conduction path between the
negative of the coil and -B.
Collect information about:
the voltage applied across the EVP coil,
the current in the coil,
features of the coil.
Ask for assistance to Zapi in order to verify that the software diagnoses are in
accordance with the type of coil employed.

Zapi DUALACE2 NEW GENERATION Specifications

General

Brand	Zapi
Model	DUALACE2 NEW GENERATION
Category	Controller
Language	English