lp-505 Rev. 000 Rel. 015 Date 1.7.20
53
Part 10 - Troubleshooting
A. Error Code
When the water heater encounters an error, the display will flash “Er” followed by a numerical code. The water heater shall enter a soft lockout
condition if the error is such that it can return to normal operation once the condition relieves itself (overheat conditions, NTC open or shorts,
etc.). The water heater shall enter a hard lockout if the condition indicates something more serious (flame, ignition, condensate line, etc.) To
clear a hard lockout Error Code, press the Power button. See Figure 52.
The following screen will display when the water heater encounters an error.
Figure 52 - Error Screen
Error Code
Error Code Description
Possible Remedies
Er:10
Flame has extinguished 8
(eight) times
Press the Power button to clear the Error Code. The Code will also automatically reset after one hour (up to
three (3) times.
If Error happens again:
1. Monitor the gas pressure to the water heater 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 10 (ten)
times
Press the Power button to clear the Error Code. The Code will also automatically reset after one hour (up to
three (3) times.
If Error happens again:
1. Monitor the gas pressure to the water heater 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 or DHW Sensor
Detects Water Temperature
Greater than 199
o
F (93
o
C)
This Error Code will go away when the DHW temperature decreases.
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 DHW inlet pipe is blocked. Ensure there is enough water flowing to the water heater.
3. Check DHW sensor at DHW outlet. If resistance is zero, replace the sensor.
4. Check Operating Temperature sensor at the heat exchanger. If resistance is zero, replace the sensor.
5. If the problem persists, replace the main control.
Er:20
Temperature High Limit
Overheat Switch - Closed is
Normal, Open is Fault
Press the Power button to clear the Error Code.
1. Inspect the High Limit Overheat switch. Ensure proper connections.
2. Check High Limit Overheat switch resistance. If resistance is not zero, replace the switch.
3. If the problem persists, replace the main control.
Er:29
APS/Condensate - Closed
is Normal, Open is Fault
(Condensate Drain Trap)
Press the Power button to clear the Error Code.
1. Check APS/Condensate and main controller connections. Ensure all are secure.
2. Check APS/Condensate resistance. If resistance is not zero, replace the switch.
3. Check APS/Condensate hose. Ensure it is connected and in good condition.
4. Check condensate line and termination for blockages.
5. Check exhaust vent for blockages.
6. If the problem persists, replace the main control.
Er:31
Water Inlet Sensor Open or
Short
This Error Code will go away when inlet water temperature decreases.
If Error happens again:
1. Check inlet water temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Summary of Contents for Hydra Smart RT-199
Page 40: ...lp 505 Rev 000 Rel 015 Date 1 7 20 40 Figure 38 150 Model Electrical Wiring Diagram ...
Page 41: ...lp 505 Rev 000 Rel 015 Date 1 7 20 41 Figure 39 150 Model Ladder Diagram ...
Page 42: ...lp 505 Rev 000 Rel 015 Date 1 7 20 42 Figure 40 199 Model Electrical Wiring Diagram ...
Page 43: ...lp 505 Rev 000 Rel 015 Date 1 7 20 43 Figure 41 199 Model Ladder Diagram ...
