55
LP-520 REV. 5.1.17
24: SF
158 F
Internal DHW Storage Tank
Setpoint
Sets the Internal DHW Storage Tank Setpoint
Range:140 ~ 167
o
F
25: So
27 F
Internal DHW Storage Tank
Differential
Sets the Internal DHW Storage Tank Differential
Range: 9 ~ 36
o
F
26: dt
2
Delay time when switching from
DHW mode to CH mode
Range: 0
– 2 minutes
Display
Default
Detail
Description
27:PE
1
Internal CH Pump Post-Purge
Time,
T/T Satisfied
Allows the user to set the appliance pump post purge time once the
appliance CH setpoint and thermostat are satisfied.
Range: 1-5 minutes
28: HA
HA 0
N/A
N/A
29: AP
AP: cP
5
Internal CH Pump and
Internal DHW Storage
Pump Test Mode
This function sets the time to run both the Internal CH and Internal DHW
Storage pumps to purge air from the system.
Range: 1
– 30 minutes
cP: off or
cP: on
OFF
Internal CH Pump and
Internal DHW Storage
Pump Test Mode
Turn this function on to activate Internal CH and Internal DHW Storage pump
testing.
Only works in installation mode. Turns off when in normal mode.
Table 23
– Installer Mode Descriptions
J. ERROR MODE
The following screen will display when the appliance encounters an error.
Figure 43
– Error Mode Screen
Error Code
Error Code Description
Possible Remedies
Er:10
Flame has Extinguished 5
(Five) Times
Press the Power button to clear the Error Code.
If Error happens again:
1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is between 3.5 and
14” WC.
2. Check gas valve wire. Ensure connection is secure.
3. Check flame detection sensor. Ensure connections are secure. Normal operating settings are more
than 2.5DC before ignition, less than 2.5DC after ignition.
4. Check vent terminations. Ensure there are no blockages.
5. Assure that the flame is stable when lit.
6. If the problem persists, replace the main control.
Er:11
Ignition has Failed 5 (Five)
Times
Press the Power button to clear the Error Code.
If Error happens again:
1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is between 3.5 and
14” WC.
2. Check gas valve wire. Ensure connection is secure.
3. Check flame detection sensor. Ensure connections are secure. Normal operating settings are more
than 2.5DC before ignition, less than 2.5DC after ignition.
4. Check igniter transformer for proper connection.
5. Clean the spark igniter with steel wool to remove oxides. Ensure proper separation (3-4 mm).
6. Replace the spark igniter if damaged.
7. Assure that the flame is stable when lit.
8. If the problem persists, replace the main control.
Er:16
Operating Temperature
Sensor detects Water
Temperature Greater than
203
o
F (95
o
C)
Press the Power button to clear the Error Code.
If Error happens again:
1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for normal operation.
2. Check if CH inlet pipe is blocked. Ensure there is enough water flowing to the appliance.
3. Check Operating Temperature sensor at CH heat exchanger outlet. If resistance is zero, replace the
sensor.
4. If the problem persists, replace the main control.
