PeerlessBoilers PBC-34, Installation, Operation & Maintenance Manual

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46
TROUBLESHOOTING
Table 10.1 (contl): Lockout Codes
Error
Number
Error Display Corrective Action
6 FAN_ERROR_TOO_SLOW
Fan runs to slow for more than 60 seconds
– Check voltage to the blower. A low voltage can cause the blower to run at the incorrect
speed due to lack of power. Replace blower if voltage is correct.
– Check for continuity through blower control harness, 5 pin connector to J4 connector on
control board. If continuity is not found, replace harness.
– Replace control if other actions do not correct issue.
7 FAN_ERROR_TOO_FAST
Fan runs to fast for more than 60 seconds
– Check for continuity through blower control harness, 5 pin connector to J4 connector on
control board. If continuity is not found, replace harness.
– Replace control if other actions do not correct issue.
8 RAM_ERROR
Internal software error. Replace Control.
9 WRONG_EEPROM_SIGNATURE
Contents of E2prom is not up to date. Replace Control.
10 E2PROM_ERROR
Wrong safety parameters in E2prom. Replace Control.
11 STATE_ERROR
Internal software error. Replace Control.
12 ROM_ERROR
Internal software error. Replace Control.
15 MAX_TEMP_ERROR
Thermal Fuse in the main heat exchanger body has tripped. This fuse should only open if
extreme conditions have occurred within the unit.
– Replace Heat exchanger or entire boiler.
– Check all safety limits and sensors before resuming operation of the unit.
– Check target wall and burner door insulation for degradation on old heat exchanger.
Evidence of heavy recirculation.
– Check internal pump operation.
16 FLUE_GAS_ERROR
Flue Temperature exceeded the maximum flue temperature limit (192.2°F (89°C)).
– Lower system setpoint to decrease flue temperature.
– Check temperature delta across the boiler supply and return. A low delta will cause
increased flue temperatures due to poor energy transfer.
17 STACK_ERROR
Internal software error. Replace Control.
18 INSTRUCTION_ERROR
Internal software error. Replace Control.
19 ION_CHECK_FAILED
Internal software error. Replace Control.
20 FLAME_OUT_TOO_LATE
Flame still present 10 seconds after closing the gas valve.
– Check flame sensor for a short to ground. Replace sensor, sensor gasket or harness if short
is found.
– Check solenoid on gas valve for operation. Gas valve might not be closing properly.
Replace gas valve.
21 FLAME_BEFORE_IGNIT
Flame is detected before ignition.
– Check flame sensor for a short to ground. Replace sensor, sensor gasket or harness if short
is found.
23 CORRUPTED_ERROR_NR
Error code RAM byte was corrupted to an unknown error codes. Replace control
29 PSM_ERROR
Internal software error. Replace control.
30 REGISTER_ERROR
Internal software error. Repl;ace control.
33 LWCO_1_ERROR
Low water cut off error.
– If using LWCO probe kit, check system for leaks and filling valve for operation. Check
wiring to LWCO probe and that the connector to the probe is securely attached. Check
grounding to piping where the LWCO probe is installed. Ensure that the probe is installed
in a location that is not collecting air.
– If not using the LWCO probe kit, check the jumper across terminal 5 and 6 on the low
voltage terminal block. If broken replace with a 15 k
Ω
or similar resistor.
38 FLUE_PRESSURE_LOCKING
More than 3 Blocked Flue/ Condensate Switch in 24 hours.
– Check for blockages in the vent pipe or heat exchanger.
– Check for blockages in the condensate system inside or after the condensate trap. A slow
drainage of condensate could cause condensate back up that will trip this switch under
certain conditions.