520 Indoor / 520 Outdoor Service Manual
Ver. 1.00
59
CONFIDENTIAL
Diagnostics information
3-digit 7-seg LED on the
computer board
Remote controller (9007603005)
Mode
#**
Unit information (#1 to #4)
Mode
#**
Unit information (#1 to #4)
N/A
d19
N/A
19
N/A
・
・・
・
・・
d25
25
Current value of Proportional
valve
d26 0 to 999
26 0 to 9,999 (×0.1mA)
The number of Combustion
stages
(520 Indoor/520 Outdoor has
4 stages for combustion.)
d27
“1” means 1
st
stage
“2” means 2
nd
stage
“3” means 3
rd
stage
“4” means 4
th
stage
“0” means No burning
27
“1” means 1
st
stage
“2” means 2
nd
stage
“3” means 3
rd
stage
“4” means 4
th
stage
“0” means No burning
Energization time of Unit
d28 0 to 999 (×100 hours)
28 0 to 9,999 (×10 hours)
Estimated
output
from
Computer board
d29 0 to 999 (×1000 BTU/h)
29 0 to 9,999 (×100 BTU)
Actual output of Unit
d30 0 to 999 (×1000 BTU/h)
30 0 to 9,999 (×100 BTU)
Integrating flow of Unit
d31 0 to 999 (×10000 gallon)
31 0 to 9,999 (×1000 gallon)
Integrating output of Unit
d32 0 to 999 MBTU (×10 MBTU)
32 0 to 9,999 MBTU
Mode #’s will be displayed as a number (e.g. “1”, “2”,……, “32”) on the 9007603005. On the 3-digit
7-Seg LED on the computer board, Mode #’s will be displayed as hexadecimal values, going from “d1” to
“d32”.
* Computer board: Press and hold the “Number display” button on the computer board while in
mode# 14 for at least 3 seconds to completely clear the memory in the error code history.
* 9007603005: Simultaneously press the “INFORMATION” button and the “BUZZER” buttons on the
9007603005 while in mode# 14 for at least 5 seconds to completely clear the memory in the error
code history.
