I Displays - Zodiac Z900 TD20 Instructions For Installation And Use Manual

4.2 I Displays

• The fault number may vary according to the number of compressor(s) in the heat pump.
Display
Water temperature too low
Defrosti ng in progress
Error during defrosti ng:
• maximum ti me exceeded
• temperature not reached
Sensor is faulty or offl ine
Water inlet
sensor fault
Sensor is faulty or offl ine
Water outlet
sensor fault
Sensor is faulty or offl ine
Air inlet sensor
fault
Sensor is faulty or offl ine
Pressure sensor
fault
• Defecti ve connecti on or contacts
open
• Wrong voltage (outside tolerance
limits ±5%)
EEPROM fault
Problem saving parameters in the
EEPROM non-volati le memory
EEPROM fault
Water fl ow problem
Water fl ow
switch
The water fl ow is too low, the
diff erence between the b01 sensor
(water inlet sensor) and the b02
sensor (water outlet sensor) must
be lower than or equal to 6°C.
Possible causes Soluti ons
Wait unti l the water temperature rises
naturally
Wait unti l the cycle is fi nished
The air temperature is too low, wait unti l
the temperature rises naturally
Reconnect or change the sensor
Reconnect or change the sensor
Reconnect or change the sensor
Reconnect or change the sensor
Check the voltage and close the
contacts
Call a qualifi ed technician
• Make sure that there fl ow passing
through the heat pump
• Check the fl ow switch
Increase the water fl ow
Resetti ng
Automati c
Automati c
Automati c
EN
Automati c
Automati c
Automati c
Automati c
Automati c
Automati c
Automati c
Automati c if
fewer than 3
faults within the
hour on TD20-
TD30, otherwise
manual
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