PEERLESS PF-50 Installation, Operation & Maintenance Manual page 61

Table 10.2: Control Board Locking Error Codes (manual reset):
"A"
CODE
A01 IGNITION ERROR
A02 FLAME FAILURE
A03 OVERHEAT LIMIT OPEN
INTERNAL ERROR GAS VALVE
A04
RELAY
INTERNAL ERROR SAFETY
A05
RELAY
INTERNAL SOFTWARE ERR
A09
RAM ERROR
A09 INTERNAL SOFTWARE ERR
A09 INTERNAL SOFTWARE ERR
A09 INTERNAL SOFTWARE ERR
A09 INTERNAL SOFTWARE ERR
COMMUNICATION ERROR
A10
E2PROM ERROR
* The flame is sensed through both the sensor and the igniter.
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Internal
Error Display
No.
1
24
18
5
6
9
27
28
29
30
12
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Error Description
Three consecutive unsuccessful
ignition attempts.
Three consecutive flame failures
during one demand.
High Temperature Limit Open
(Set Temperature: 195°F)
Gas Valve Relay Problems.
Safety Relay Problems.
Internal Software Error.
Internal Software Error.
Internal Software Error.
Internal Software Error.
Internal Software Error.
No Communication with
E2prom.
TROUBLESHOOTING
Corrective Action
1. Watch the igniter through the observation
window.
2. If no spark is present, check the spark electrode
for the proper 3/16" gap.
3. Remove any corrosion from the spark electrode
with abrasive.
4. If spark is present but no flame, check the gas
supply to the boiler. Check for high or low
pressure.
5. If there is a flame, check the flame signal ignition
log in the Installer Menu. If values for flame signal
are less than 3.1 µA, check wiring connections
and clean the harness connector at the control.
6. Determine if gas valve is opening by monitoring
gas pressure.
7. Check gas presure.
1. If boiler sparks, lights briefly and then goes out:
a. Disconnect the flame sensor cable and then
retry ignition.*
b. If the flame stays lit, allow the boiler to run for
several minutes and then reattach the cable.*
c. If the problem persists, remove the flame
sensor and inspect the burner through the
sensor opening. If metal fibers are protruding
from the burner, use a blunt probe to move the
fibers away from the sensor.
d. If the problem is still present, replace the flame
sensor.
2. If the unit locks out on flame failure during
normal operation:
a. Check gas pressure at the inlet to the gas valve
(See figure 5.2) while the boiler is operating.
b. Check the flame signal in the Installer Menu
under Status. This will also show the total
number of flame failures. If the flame signal
reads less than 2.8 µA, clean the sensor and
igniter. Be sure that the wiring harness is fully
seated at the control.
c. If the flame signal is consistently low, check the
signal with the sensor disconnected. If the
flame signal improves, replace the flame sensor.
1. Check CH, DHW, General Pump Operation
2. Assure that there is adequate flow through the
boiler by checking the status menu and assuring
less than 40°F temperature rise across the boiler.
3. Check thermistor reading on the supply
thermistor. Replace it if necessary.
Replace control
Replace Control
Replace Control
Replace Control
Replace Control
Replace Control
Replace Control
Replace Control
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