BENSON VRA 065 - 12 Fault Finding

Fault Cause Solution
Heater will not run - No power
- No Demand
-Check power supply / Isolator / On off Switch
-Check thermostat setting
Limit stat trips -Main fan motor faulty
-Fan obstructed/dirty
Discharge blocked
Excessive gas pressure
-Thermostat failure.
-Replace fan motor
-Clean fan
-Clear blockage
-Check gas pressure
-Replace stat
Ignition takes place the
heater lights
The control box locks out
(Lockout lamp illuminated)
-Incorrect electrical connection
-Faulty gas valve
-Faulty control box
-Ionisation probe failure
-Air in gas pipework
-No gas
- Rewire correctly
- Replace
- Replace
-Check connections / replace probe
-Purge Gas line
-Check gas pressure
Heater locks out during
operation
(Lockout lamp illuminated)
-Gas pressure failure
-Probe failure
-Power loss
-Check pressure
-Reset the control box
-Check electrical connection
Main fan runs before the unit
is at temperature
-Fan Thermostat -Incorrect fan thermostat setting
Ensure stat is set to 35 degrees
Insufficient heat output -Bad thermostat position
-Incorrect thermostat setting
-Insufficient gas pressure
-Incorrect or faulty injectors
-Move thermostat
-Reset thermostat settings
-Check heater head pressure is sufficient
-Check injectors replace if faulty.
12– FAULT FINDING
3 1 2
External indication lights
1 - Fault indication
2 - Power indication
3 - Lockout indication