Paloma PH2-20R DVSN, Engineering Handbook

Page: 14 / 172

14 | Page SVC 820 Tankless Gas Trouble Shooting Manual
14
76
Communication Fault
With Remote Control
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
79
Blower Motor
Current Fault
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
80
&
81
Gas Control Valve
1. Ohm Gas Control Valve
2. Check voltage of all Flame Rods
82
Installation:
Control Board Is Not
Programmed.
Verify Program Chip is installed
90
Maintenance/Installation:
Blocked Flue/Air Intake
Clean any blockage in Heat Exchanger, Blower Motor, inlet flue and exhaust flue
92
Condensing Only:
Maintenance Warning:
Neutralizer Needs To Be
Replaced (Unit Will Still
Be Operable)
Replace Neutralizer
93
Condensing Only:
Maintenance:
Neutralizer Must Be
Replaced (Unit Will NOT
Operate)
Replace Neutralizer
99
Maintenance/Installation:
Blower Motor Cannot
Vent
1. Clear vent blockages
2. Check for blocked Heat Exchanger