Installation/Operation
Manual
Pucada Tech
~ 54 ~ www.pucada.com
ECO Series
AQUA Series
P Series
Category
Problem
Description
Operation
Mode
How to Reset
Error
Solution
W02
Water Leakage
Warning
Turn-Off and
Turn-on
Water
1. Check faucet if dripping water
2. Check plumbing if any water leak
develops
W03
Condensate trap
full
Shutdown
Turn-Off and
Turn-on
Water
1. Check the condensate trap drain for
blockage.
2. Clean up the blockage
3. Replace the control box.
W04
Filter icon
(LCD)
Fan
Clean filter
Warning
In OFF
mode, press
and hold UP
and DOWN
for 3 seconds
1. Remove the filter from inlet and
clear the particle inside
2. Clean the error message
S02
Operation
Overtime
Combustion
continuously
over 20hours
Shutdown
Turn-Off and
Turn-on
Water
Turn-Off and Turn-on water
H01
Efficiency is
lower than
factory setting
Warning
Turn-Off and
Turn-on
Water
1. Check if gas type and pressure is
correct
2. NTC oxidized
3. Replace water flow sensor
4. Rinse and clean heat exchanger
H02
Heat
Exchanger
Efficiency is
higher than
factory setting
Warning
Turn-Off and
Turn-on
Water
1. Check if gas type and pressure is
correct
L03
LCD
Control
Panel
Communication
error
Shutdown
Auto Reset
1. Check if the red LED indicator flash
on control box
2. Replace control box
U01
Master unit
Communication
error
Shutdown
Auto Reset
Replace multiple heater connector
U02
Slave unit
Communication
error
Warning
Turn-Off and
Turn-on Water
Replace multiple heater connector
U03
Cascading
Units (Link)
Slave unit error
Warning
Press and
hold Off and
Reset
for more than
3 seconds
1. Check and reset slave units error.
2. Press RESET and OFF for 3
seconds from Master unit reset.
No
Power
1. Check AC power
2.If it is fuse blown, replace the fuse
No
Display
1. Replace Control Box power cord
2. Replace thermo switch