A.O. Smith Water Heater 520 Direct Vent Indoor Service Manual page 60

<Description of mode numbers in "Diagnostics Mode" for whole unit in Easy-link system>
Diagnostics information
Total system flow rate
BTU requirement for the
Easy-link system
Quantity of connected 520
Indoor or 520 Outdoors
Priority 520 Indoor or 520
Outdoor unit
Quantity of operational 520
Indoor or 520 Outdoors
Set temperature
Operation time during current
rotation
ON/OFF cycles during current
rotation
N/A
Inlet temperature of
priority unit
Mixing temperature of the
priority unit
N/A
Activation of freeze protection
pump
Activation of detection for
pump error
Activation of pump
operation
NOTE: The "h1" to "h15" can be selected only in parent unit.
***When the dipswitch No.4 (the right bank) on the 520 models computer board is set to the "OFF"
position, press and hold the "Number display" button on the computer board while in mode# P3
for at least 3 seconds to display the "Pon". Then, turn off the 9007603005. "Pon" means pump
test operation is in the "ON" mode.
3-digit 7-seg LED on the
computer board
Mode Whole easy-link system
#** information (#0)
h1 0.0 to 99.9 GPM
h2 0 to 999 (×1,000 BTU/h)
h3 1 to 4 (units)
h4 1 to 4 (unit #)
h5 1 to 4 (units)
h6 100 to 185 °F
0 to 720 (minutes). After
h7 720, the
occurs
0 to 100 (cycles). After 100,
h8
the next rotation occurs
h9
h10
h11
the
h12 32 to 212 ˚F
h13 32 to 212 ˚F
h14
h15
P1 OFF or ON (Default:OFF)
P2 OFF or ON (Default:OFF)
test
P3 Pon***
520 Indoor / 520 Outdoor Service Manual
Remote controller (9007603005)
Mode
#**
h1
h2
h3
h4
h5
h6
next rotation h7
h8
h9
h10
N/A
h11
h12
h13
h14
N/A
h15
P1
P2
P3
60
CONFIDENTIAL
Ver. 1.00
Whole easy-link system
information (#0)
0 to 9,999 (×0.1 GPM)
0 to 9,999 (×100 BTU/h)
1 to 4 (units)
1 to 4 (unit #)
1 to 4 (units)
0 to 720 (minutes). After 720,
the next rotation occurs
0 to 100 (cycles). After 100,
the next rotation occurs
N/A
32 to 212 ˚F
32 to 212 ˚F
N/A
N/A