Technical data
Technical documentation 
Technical documentation
STZS ed. 06/03
28
ZEUS SUPERIOR
INDICATORS 
(display card) 
DL1 
This green LED lights up when the boiler is working in central-heating and antifreeze 
mode. 
DL2 
This green LED lights up when the boiler is working in d.h.w. mode. 
DL3 
This orange LED lights up when the burner is operating. 
Display 
Depending on the condition, this indicates: 
- the value of the temperature detected by the delivery sensor (NR) during operation in 
central-heating, d.h.w., antifreeze and chimneysweep mode. 
- The value set during the heating and domestic hot water circuit temperature adjustment 
(for 5 seconds). 
- the letters CE with the CAR installed and the main switch in position     
- The code number of the safety device that has tripped 
01 = no ignition lock 
02 = overheating safety device thermostat lock 
03 = flue pressure switch contact not deviated (NO) 
05 = NTC flow sensor faulty 
10 = pump pressure switch safety 
11 = flue pressure switch contact not at rest (NC) 
12 = domestic hot water NTC sensor faulty (storage tank NTC) 
14 = connection between ignition control unit and board not correct or ignition control unit 
faulty 
31 = incompatible or faulty remote control (optional) 










