Monitoring Sequence - Paloma PH2-20R OFN Engineering Handbook

Imperfect
No
Combustion Flow Chart
Alarm
Yes
05 Warning Code Flashing
Ignition Failure
Flame Failure
Condensation Not Draining
OHL Activated
Hot Water > 207 Degrees F
for more than 15 seconds
Heat Exchanger > 207
Degrees F for more than 15
seconds
Outlet water temperature
too high
35
Trouble with
Thermistor(s)
29
Heat Exchanger
Outlet Temp Too
Low
SVC 820-Tankless Gas Trouble Shooting Manual
Decrease of
No
Fan Motor
Ventilation
Yes
10 Warning Code Flashing
29: Condensing Only
14
15
15
16
71
Gas Control Valve
52
PGFR – Gas Control
Valve
34
Ambient
Thermistor
2 – Monitoring Sequence: while unit is in
Attempt to Re-Ignite
Yes
1-2 Ignition
Attempts
76
Communication Blower Motor
Trouble – Remote Current Not
Control
61
Blower Motor Water Control Body
33
Outlet Thermistor Heat Exchanger
Thermistor
Page | 7
operation
11
No
12
Next Page
79 13
Flame Rod
Detected
65 66
Bypass Assembly
32 31
Inlet Thermistor
7