Paloma PH2-20R DVSN, Engineering Handbook

Page: 9 / 172

SVC 820-Tankless Gas Trouble Shooting Manual Page | 9
9
Error Code
Code
Fault Remedy
No
Code
Flow Rate/Maintenance:
Nothing Happens When
Water Is Flowing Through
Unit
. (Control Board
Displays Water Temp)
1. Increase water flow rate or set higher temperature
2. New Installations: Ensure hot and cold water lines are not crossed
3. Check for plumbing crossover in the home
4. Clean water inlet filter
5. Check water flow sensor (may be jammed)
P1
Maintenance Warning:
Water Flow Too Low
(Unit Will Still Be
Operable; Minimum Flow
0.40 GPM To Activate @
35
o
) T
1. Check hot water tap flow (clean aerator if necessary)
2. Clean water inlet filter
3. Increase flow rate or set higher temperature
If maintenance requirements are met:
1. Check water flow sensor
1L
Maintenance:
Water Heater Has
Buildup Of Lime/Scale
Deposits
1. Flush Heat Exchanger
2. High Altitude Installations: ensure proper altitude settings have been made
03 MIC 185, MIC 6, & EZ Link
1. Check communications cable connection
2. Check # 4 dip switch setting is in the ‘ON’ position (Dip Set # 1 (Top), Dip
switch # 4 on the water heaters only)
05
Maintenance Warning:
Air Intake Or Vent
Exhaust May Be Blocked
(Unit Will Still Be
Operable)
1. Remove any vent blockage
2. Make sure venting meets all installation requirements
If maintenance requirements are met:
1. Check fan motor
Installation Warning:
The vent Pipes On The
Vent Termination May
Not Be Connected (Unit
Will Still Be Operable)
Make sure all venting is properly sealed and meets all venting requirements (diameter;
vent lengths; venting material; venting obstructions; and all other installation
requirements as described in installation manual)
If installation requirements are met:
1. Check Blower Motor