Paloma PH2-20R OFN Engineering Handbook page 14

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Communication Fault
76
With Remote Control
Blower Motor
79
Current Fault
80
& Gas Control Valve
81
Installation:
82
Control Board Is Not
Programmed.
Maintenance/Installation:
90
Blocked Flue/Air Intake
Condensing Only:
Maintenance Warning:
92
Neutralizer Needs To Be
Replaced (Unit Will Still
Be Operable)
Condensing Only:
Maintenance:
93
Neutralizer Must Be
Replaced (Unit Will NOT
Operate)
Maintenance/Installation:
99
Blower Motor Cannot
Vent
14
SVC 820 Tankless Gas Trouble Shooting Manual
1. Check Remote Control wiring for loose or damaged connections
2. Bypass Remote Control: connect Remote Control directly to remote
connection at bottom of the heater. Replace cable if found to be faulty
3. Remove water heater power cord from 3 prong outlet. Disconnect the
Remote Control. Plug heater back into supply and test heater without Remote
Control connected
1. Ensure Blower Motor will turn freely. Motor will operate with a small amount
of restriction
2. Check Fan Motor for proper voltage and for water (condensation) damage
1. Ohm Gas Control Valve
2. Check voltage of all Flame Rods
Verify Program Chip is installed
Clean any blockage in Heat Exchanger, Blower Motor, inlet flue and exhaust flue
Replace Neutralizer
Replace Neutralizer
1. Clear vent blockages
2. Check for blocked Heat Exchanger