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240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
Mode # Whole multi-unit system information (#0)
Unit information (#1 to #4)
1
Total system flow rate
0 to 999 (GPM)
Total operation time
0 to 999 (x 100 hours)
2
BTU requirement for
the multi-system
0 to 999 (
×kBTU/h)
ON/OFF cycles
0 to 999
(× 1,000 cycles)
3
Quantity of connected
water heaters
1 to 4 (units)
Fan motor speed
0 to 999 (× 10 rpm)
4
Priority water heater
unit
1 to 4 (unit #)
Inlet temperature
32 to 212 (°F).
Over 212 °F = E5,
Under 32 °F = E0
5
Quantity of
operational water
heaters
0 to 4 (units)
Heat exchanger
temperature (540
(T-H3) models only)
6
Set temperature
100 to 185 °F
Outlet temperature
7
Operation time during
current rotation
0 to 720 (minutes).
After 720, the next
rotation occurs
Air-Fuel ratio rod
current
0 to 999 (μA)
8
ON/OFF cycles during
current rotation
0 to 100 (cycles).
After 100, the next
rotation occurs
Flow rate
0 to 999 (× 0.1 GPM)
9
N/A
Energization time of
unit
0 to 999 (× 100 hours)
10
Integrating flow of
unit
0 to 999
(× 10,000 gallons)
11
Error code history: displays most recent error
code
12
Inlet temperature of
the priority unit
32 to 212 (°F).
Over 212 °F = E5,
Under 32 °F = E0
Error code history: displays 2nd most recent
error code
13
Outlet temperature of
the priority unit
Error code history: displays 3rd most recent
error code
14
N/A
Clears memory in error code history*
15
Integrating output of
unit
0 to 999 MBTU/h
16
Air-fuel ratio stage
0 to 16,
normal condition=6
17
Exhaust temperature
(Direct Vent Indoor
models only)
32 to 212 (°F).
Over 212 °F = E5,
Under 32 °F = E0
18
N/A
Description of mode numbers in “Diagnostics Mode”
