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Part number 550-100-325/0419
96
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
Display Condition
FAULT 07 =
If the exhaust gases temperature becomes higher than Maximum exhaust gases temperature and the high tem-
perature is present longer than 5 seconds, controller will stop indicating fault 7, where he will stay for 15 minute.
If the exhaust temperature is within normal levels after this time expired, error 7 will be resolved by itself.
FAULT 10 =
CH supply sensor 1 (Supply Temp sensor) out of normal operating range (short circuit or open circuit). If sensor
goes outside the range, error will be generated. In case sensor is back to the normal operating range, error is
gone. In error mode, heat demands will be disabled. In case 2 or more sensors are broken, controller will pick
up the rst that was outside the operating range. Resolving situation can be achieved only if the sensor is within
operating range again.
FAULT 11 =
CH return sensor out of normal operating range (short circuit or open circuit). If sensor goes outside the range,
error will be generated. In case sensor is back to the normal operating range, error is gone. In error mode, heat
demands will be disabled. In case 2 or more sensors are broken, controller will pick up the rst that was outside
the operating range. Resolving situation can be achieved only if the sensor is within operating range again.
FAULT 12 =
DHW sensor out of normal operating range (short circuit or open circuit). If sensor goes outside the range, error
will be generated. In case sensor is back to the normal operating range, error is gone. In error mode, only DHW
heat demands will be disabled. In case 2 or more sensors are broken, controller will pick up the rst that was
outside the operating range. Resolving situation can be achieved only if the sensor is within operating range again.
FAULT 13 =
Exhaust sensor out of normal operating range (short circuit or open circuit). If sensor goes outside the range,
error will be generated. In case sensor is back to the normal operating range, error is gone. In error mode, heat
demands will be disabled. In case 2 or more sensors are broken, controller will pick up the rst that was outside
the operating range. Resolving situation can be achieved only if the sensor is within operating range again.
FAULT 14 =
CH supply sensor 2 (High Limit sensor) out of normal operating range (short circuit or open circuit). If sensor
goes outside the range , error will be generated. In case sensor is back to the normal operating range, error is
gone. In error mode, heat demands will be disabled. In case 2 or more sensors are broken, controller will pick
up the rst that was outside the operating range. Resolving situation can be achieved only if the sensor is within
operating range again.
FAULT 15 =
Blower driving problem – in case of new burner request the fan is switched on: if the controller measured a
frequency lower than 20Hz or higher than 295Hz, error will be set (with a conrming time of 15 seconds). In
case speed is back to the normal operating range, error is gone. In error mode, heat demands will be disabled.
Resolving situation can be achieved only if the speed is within operating range again.
FAULT 20 =
Warning – The water pressure, measured by the water pressure sensor, is higher than the low level and lower
than the nominal level. This is only an indication, the heat request is not switched off.
FAULT 21 =
Warning – The water pressure, measured by the water pressure sensor, is higher than the high level –4.3 psi
and lower than the high level. This is only an indication, the heat request is not switched off but there is a linear
output reduction in this way: if Water pressure Water pressure high limit-4.3 psi there is no limitation, if Water
pressure Water pressure high limit-2.9 psi then the maximum output is equal to (Blower absolute DHW maxi-
mum speed - Blower absolute minimum speed), if Water pressure Water pressure high limit-1.5 psi then the
maximum output is equal to Blower absolute minimum speed + 20Hz.
FAULT 27 =
With the PVC/CPVC selection parameter equal to:
1. If, during the ue gas protection mode, the power reduction reaches the 0% value and the ue gas tem-
perature is still upper than the PVC maximum temperature, the controller stops indicating fault 27, where it
will stay for 5 minutes. The error solves itself after 5 minutes.
2. If, during the ue gas protection mode, the power reduction reaches the 0% value and the ue gas tem-
perature is still upper than the CPVC maximum temperature, the controller stops indicating fault 27, where
it will stay for 5 minutes. The error solves itself after 5 minutes.
Figure 121(continued)
37 Troubleshooting(continued)
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