Fault Finding - Trianco Aztec Mini Installation & Operation Manual

Information codes
Code Protection Function
Current leakage
E2
Water temperature
sensor
E3
Indoor temperature
sensor
E5
Low Water Pressure
F4
No water Flow
F6
Dry Fire Protection
F1
The boiler has built in over temperature protection. If the water temperature exceeds 140°C the limit
thermostat will trip and the screen will be blank.
The thermostat will require re-setting by a qualified person.

FAULT FINDING

Description
Moisture on circuit board or the
boiler has condensation internally
Sensor is short circuit or open circuit
Sensor is short circuit or open circuit
System is low on water
Air in the system, no water or water
pump not working, pump is blocked,
water flow switch blocked, water flow
switch is faulty
No water flow
9
Qualified engineer to remove
cover and dry/inspect circuit
board
Check sensor connection. Check
sensor cable and replace if
required
Check sensor connection. Check
sensor cable and replace if
required
Fill to correct pressure using
filling loop
Vent system. Check system
pressure. Check pump and flow
switch for blockage/operation
Fill system and vent
Press and hold TIME key for 6
seconds to re-set