PeerlessBoilers PBC-40 - Page 49

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TROUBLESHOOTING
Table 10.2: Blocking Errors
Error
Number
Error Display Corrective_ Action
100 WD_ERROR_RAM Internal software error. If error persists, replace control.
101 WD_ERROR_ROM Internal software error, If error persists, replace control.
102 WD_ERROR_STACK Internal software error. If error persists, replace control.
103 WD_ERROR_REGISTER Internal software error. If error persists, replace control.
104 WE_ERROR_XRL Internal software error. If error persists, replace control.
105 HIGH_TEMP_ERROR T_Supply and T_Supply_2 over Stayburn temperature of 190°F
106 REFHI_TOO_HIGH Internal hardware error. If error persists, replace control.
107 REFHI_TOO_LOW Internal hardware error. If error persists, replace control.
108 REFLO_TOO_HIGH Internal hardware error. If error persists, replace control.
109 REFLO_TOO_LOW Internal hardware error. If error persists, replace control.
110 REFHI2_TOO_HIGH Internal hardware error. If error persists, replace control.
111 REFHI2_TOO_LOW Internal hardware error. If error persists, replace control.
112 REFLO2_TOO_HIGH Internal hardware error. If error persists, replace control.
113 REFLO2_TOO_LOW Internal hardware error. If error persists, replace control.
114 FALSE_FLAME
Flame detected in a state in which no flame should be present.
–
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.
115 LOW_WATER_PRESSURE_ERROR
Low water pressure sensor error
–
Replace sensor if error does not correct itself
116 LOW_WATER_PRESSURE_SENSOR
Low water pressure in system
–
Check system pressure
–
Check filling valve setting and expansion tank pressure
–
Check system for leaks.
118 WD_COMM_ERROR Watchdog communication error. If error persists, replace control.
119 RETURN_OPEN
Return Sensor open
–
Check sensor wiring for solid connection and continuity. Replace harness if wiring
is bad.
–
Check for resistance though the sensor by touching meter leads across both pins
on the sensor. If no circuit is present replace sensor.
120 SUPPLY_OPEN
Supply Sensor 1 open
–
Check sensor wiring for solid connection and continuity. Replace harness if wiring
is bad.
–
Check for resistance though the sensor by touching meter leads across the left two
pins on the sensor using when the retaining clip is towards you. If no circuit is
present replace sensor.
121 SUPPLY2_OPEN
Supply Sensor 2 open
–
Check sensor wiring for solid connection and continuity. Replace harness if wiring
is bad.
–
Check for resistance though the sensor by touching meter leads across the right
two pins on the sensor using when the retaining clip is towards you. If no circuit is
present replace sensor.
122 DWH_OPEN
DHW Sensor open
–
Check sensor wiring for solid connection and continuity. Replace harness if wiring
is bad.
–
Check for resistance though the sensor by touching meter leads across both pins
on the sensor. If no circuit is present replace sensor.
123 FLUE_OPEN
Flue Sensor open
–
Check sensor wiring for solid connection and continuity. Replace harness if wiring
is bad.
–
Check for resistance though the sensor by touching meter leads across both pins
on the sensor. If no circuit is present replace sensor.