HTP RT-180 User Manual

38
LP-505 REV. 4.29.14
Error Code
Error Code Description
Possible Remedies
Er:10
Flame has Extinguished 8
(Eight) Times
Press the Power button to clear the Error Code.
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.
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 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
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 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 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
Inlet Water 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.
Er:32
DHW Sensor Open or
Short
This Error Code will go away when outlet water temperature decreases.
If Error happens again:
1. Check DHW outlet 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.
Er:33
Operating Temperature
Sensor Open or Short
This Error Code will go away when outlet water temperature decreases.
If Error happens again:
1. Check operating 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.
Er:35
Exhaust Sensor Open or
Short
This Error Code will go away when exhaust temperature decreases.
If Error happens again:
1. Check exhaust temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. Check exhaust vent for blockage.
4. If the problem persists, replace the main control.
Er:38
Error Appears When
Control Stores Data, but
Data is not Saved
Press the Power button to clear the Error Code.
Replace the main control.
Er:39
Flame Detected after
Exiting a Flame On
Condition
This Error Code will go away when the false flame condition is remedied.
If Error happens again:
1. Check the water heater cover. Ensure it is secure. Flame detection sensor can detect an external
light source.
2. Check flame detection sensor. Ensure connections are secure. Normal operating settings are more
than 2.5DC before ignition, less than 2.5DC after ignition.
3. If the problem persists, replace the main control.

HTP RT-180 Specifications

General

Brand	HTP
Model	RT-180
Category	Boiler
Language	English