Specifications

SARIgas Zoom Z – ZF Page 7
Rev.0
WORKING PROBLEMS
(For tests to be carried out inside the boiler contact the Authorised Service Centre).
THE BOILER DOES NOT WORK AND THE PILOT LIGHT "D", FIG. 2, IS TURNED OFF
- Fault with the supply wire; contact the Authorised Service Centre.
- If the supply wire is damaged, it must be replaced with a special wire that can be supplied by from the
Manufacturer or by an Authorised Service Centre.
THE BOILER WORKS INTERMITTENTLY AND THE PILOT LIGHT "D" FIG. 1, FLASHES ON AND OFF
- The electronic circuit of the boiler automatically controls the correct working of some of the internal components,
and the high and low temperature alarms of the heating circuit, by flashing the pilot light "D" fig. 1, on and off. If this
light is flashing and the boiler works intermittently, wait at least 30 minutes, after which if the pilot light is still
flashing call the Authorised Service Centre to carry out the necessary checks.
THE MAIN BURNER DOES NOT FIRE FOR HEATING OR FOR PRODUCING HOT WATER
- Knobs A and B Fig. 1, of the boiler are set too low.
- The room thermostat (if fitted) is set too low.
- The safety limit thermostat has triggered.
- The manually rearmed flue gas safety limit thermostat has triggered (for models Zoom Z 420A - Z 520A).
- Gas supply blocked, for all models (the E pilot light comes on, Fig. 1).
- The ignition and flame control device is faulty (contact the Authorised Service Centre).
- Water capacity too low (less than 2.8 l./min.).
- Faulty electronic card (contact the Authorised Service Centre).
THE MAIN BURNER DOES NOT REMAIN ALIGHT
- Poor gas supply in the pipes to the meter/boiler or low gas pressure to the burner.
- The minimum gas pressure to the burner or ignition is too low.
- The electric PHASE /NEUTRAL line is not correctly connected to the boiler (inverted) or the earth connection is
missing.
THE MAIN BURNER GOES OUT AFTER BEING ALIGHT FOR JUST A FEW MINUTES
(Just models Zoom Z 420A - Z 520A)
- The fumes safety thermostat (Fig. 3) has triggered. Contact an Authorised Technician immediately to check the
boiler and/or the flue.
THE BOILER IS NOISY WHEN THE MAIN BURNER IS ALIGHT
- Elevated gas pressure to the burner.
- Water circulation to the heating system is too low.
- Faulty circulator.
- Exchanger scaled with lime.
- Boiler valves (if fitted) are closed.
- Electricity supply could be less than 195 V.
SMELL OF GAS
- Turn off the main gas valve.
- Open the doors and windows to aerate the room.
- Do not turn on any switches or any other electrical appliance (telephone – intercom – electric fans – etc.).
- Immediately call the Authorised Technician to carry out the necessary checks to the system.