FULTON FHE-250 - 4.13.2 BLOCKING ERROR CODES

FHE-250 MANUAL 09 2014 ISSUE 2
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2. BLOCKING ERROR CODES
The boiler controller also recognises fault situations that can block the heat demands but do not lead to lockout condition. When the error condition
becomes resolved, the error will disappear but will also be written into the history data. In some cases the Auto Detection function can resolve the problem,
if there is no logical reason for the error or communication error detected.
Hold the button labelled “-” on the central heating adjustment side (display, front panel) down for at least 3 seconds, then conrm the number of burner
units.
ERROR
CODE
MEANING POSSIBLE CAUSE SOLUTION
E7
TTB Exhaust Protection Description: The temperature measured on the TTB exhaust sensor is too high. The TTB ‘trip point’ is the value which denes the high limit of the exhaust gas. The limit changes depending on burner load.
a) Air-fuel ratio has changed. b) Water ow is not sufcient in
the heat exchanger.
c) Heat exchanger has a low limit
water level.
a) Find the cause of the problem and re-commission
the boiler.
b) Investigate the causes of the insufcient ow and
correct the faults before restarting the boiler.
c) Check that the automatic air vent on the heat
exchanger works correctly and the water pressure is within acceptable range
E8
MaxSys Controller Error Description: During normal operation of the ignition controller, the ame circuit is regularly checked. If the check fails, Error 8 will be set.
Internal circuit error. a) Perform a power cycle (Disconnect and reconnect
the power supply)
b) If problem persists, then replace the MaxSys
controller.
E21 MaxSys Controller Hardware Error Replace the MaxSys controller.
E25 Software Communication Error. Refer to manufacturer.
E32
DHW sensor out of normal operating range (short circuit) Description: This condition will inhibit DHW demand. The boiler can still enter CH mode.
The DHW sensor is damaged. Replace the DHW sensor.
E33
DHW sensor out of normal operating range (open circuit) Description: This condition will inhibit DHW demand. The boiler can still enter CH mode.
The DHW sensor is damaged. Replace the DHW sensor.