PEERLESS PF-50 Installation, Operation & Maintenance Manual page 62

TROUBLESHOOTING
Table 10.2 (cont'd): Control Board Locking Error Codes (manual reset):
"A"
CODE
SOFTWARE OUT OF DATE
A12
E2PROM OUT OF DATE
A13 INTERNAL ERROR
A14 INTERNAL ERROR
A15 INTERNAL ERROR
A16 INTERNAL ERROR
A18 INTERNAL ERROR
FALSE FLAME DETECTED
A19
AFTER SHUTDOWN
FALSE FLAME DETECTED
A20
BEFORE IGNITION
A23 FLOW_SW_NOT_OPEN
A24 FLOW_SW_NOT_CLOSED
A32 FAN NOT RUNNING
A33 FAN SPEED ERROR
RETURN HIGHER THAN
A50
SUPPLY
60
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Internal
Error Display
No.
10
13
14
16
22
19
20
21
25
26
23
8
11
manuals search engine
Error Description
Contents of e2prom is not
up-to-date.
Internal Software Error
Internal Software Error
Internal Software Error
Internal Software Error
Internal Software Error
Flame signal detected 10 sec.
after closing the gas valve.
Flame signal detected before gas
valve opened.
CH flow switch not working.
CH flow switch not working.
Internal Software Error.
Fan speed detected is more than
300 rpm different from targeted
value for more than 60 seconds.
Boiler return water temperature
higher than supply for more than
5 ignition attempts.
Corrective Action
Replace Control
Replace Control
Replace Control
Replace Control
Replace Control
Replace Control
1. Check flame sensor to be sure there is no short to
ground.
2. Check igniter to be sure there is not short to
ground.
3. This could also indicate that the gas valve doesn't
close completely.
4. Check flame sensor to be sure there is no short to
ground.
Check igniter to be sure there is not short to
ground.
1. Check for electrical continuity between wires
connected to terminals 9 & 10 from field supplied
flow switch.
2. If there is continuity when the circulator is off,
there is a system piping or circulator control
problem.
1. Check for electrical continuity between wires
connected to terminals 9 & 10 from the field
supplied flow switch.
2. If there is no continuity, check to be sure the
circulator is working.
3. If the circulator is working correctly, check the
flow switch.
1. Is the fan running at full speed?
• Check 4 wire control connection to blower
and control.
• Replace harness.
2. Is the fan running at a modulated speed?
• Check 4 wire control connection to blower
and control.
• Replace harness.
3. Is the fan not running?
• Check the 3 wire power connection to the
blower and control.
• Replace harness.
• Replace Blower.
1. Check system piping. Assure that the water is
entering the return connection and exiting the
supply connection.
2. Compare the supply thermistor reading to the
temperature gauge, if they don't agree, replace the
supply thermistor.