Eliwell EW971 - Diagnostics; Operational Features and Installation

74 mm
32 mm
29 mm
71 mm
70 mm
59 mm
MANUAL DEFROST CYCLE ACTIVATION
To manually activate the defrost cycle, hold down the key for 5 seconds.
If the defrost conditions are not satised:
- the parameter OdO ≠ 0 (EW961, EW971 and EW974)
- the evaporator probe Pb2 temperature is higher than the defrost end temperature (EW971 and EW974)
the display will ash 3 times, to indicate that the operation will not be carried out.
DIAGNOSTICS
Alarms are always indicated by the buzzer (if present) and the alarm icon .
To switch off the buzzer, press and release any key, the relative icon will continue to ash.
NOTES: If alarm exclusion times have been set (see ‘AL’ folder in the parameters table) the alarm will not be signalled.
A probe 1 (Pb1) malfunction alarm will appear directly on the display with the
indication E1.
Models EW971 and EW974: A probe 2 (Pb2) malfunction alarm will appear
directly on the display with the indication E2.
MECHANICAL ASSEMBLY
The instrument is designed for panel mounting. Make a hole of 29x71 mm, insert the instrument and x it using
the brackets provided. Do not mount the instrument in humid and/or dirty places; it is suitable for use in ordinary
polluted places. Ventilate the place in proximity to the instrument colling slits.