NZR – Ihr Partner für Energiemessung
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Error messages
The WZ FW 662 indicates occurring errors by displaying on the LCD the Err-sign together
with a numbered code. If several errors occur at the same time, the numbers of the error
codes are summed up.
Err1
The supply sensor is short circuited or disconnected
Err2
The return sensor is short circuited or disconnected
The temperature sensors are switched; the temperature sensor in the
cooler line is higher than the temperature sensor in the warmer line
Err4
Flow rate too high
Err8
EEPROM error in the integrator base
Err16
EEPROM error in the measurement and calibration part
Err32
Configuration error into the measurement and calibration part
Err64
Configuration error into the integrator base
Err128
Supply- and/or return sensor is/are short circuited or an internal default
Err256
Tension drop (by mains supply or bus supply)
Err512
Defective communication module connection place 1
Err1024
Defective communication module connection place 2
Err2048
Error pulse inputs additional meter A1
Err4096
Error pulse inputs additional meter A2
Err8192
Internal electronic failure, return to manufacturer
When an error lasts longer than an hour the error will be registered in the error memory
with its date and time (beginning) and duration (in minutes). When an error lasts less
than 60 minutes the error will be automatically deleted without being memorized.
The two temperature sensor indicators
are displayed on the cumulated energy by
the main menu when:
• temperature sensors are switched -> this installation error mode happens with most
installations during the summer time
• temperature in the cooler line is higher than the one in the warmer line.
These error messages are automatically deleted from the LCD display 60 seconds after
the error has been removed.
