HTP UFT-100W User Manual

50
LP-542 REV. 7.16.15
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 boiler 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 boiler 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 boiler.
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.
Er:20
Condensate – Closed
is Normal, Open is
Fault (Condensate
Drain Trap)
Press the Power button to clear the Error Code.
1. Check Condensate and main controller connections. Ensure all are secure.
2. Check Condensate sensor resistance. If resistance is zero, replace the switch.
3. Check 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:28
Overheat Sensor Open
or Short
This Error Code will go away when CH temperature decreases.
If Error happens again:
1. Check overheat temperature sensor. Ensure connections are secure.
2. Check overheat sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Er:29
APS Open
1. Check APS and connections.
2. If APS is open, replace the switch.
3. If APS is closed and connections are secure, check switch resistance. If resistance is zero, replace the
switch.
4. Check condensate line and termination for blockages.
5. Check exhaust vent for blockages.
6. Press the Power button to clear the Error Code and restart boiler.
7. If the problem persists, replace the main control.
Er:30
System Sensor
Short
NOTE: This error will only appear if the boiler is used in a cascaded system.
This Error Code will go away when system sensor is repaired or replaced.
1. Check system temperature sensor. Ensure connections are secure.
2. Check system sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
Er:32
DHW Sensor Short
NOTE: This error will only appear if an aquastat is installed and SEnS is selected in Installer Mode 39, or a
sensor is used and it is shorted.
This Error Code will go away if an aquastat is installed, AquA is selected in Installer Mode 39, and the
boiler is powered OFF and ON, or the DHW sensor is repaired or replaced.
1. Check DHW sensor. If an aquastat, ensure AquA is selected in Installer Mode 39. If a sensor, ensure
connections are secure.
2. Check DHW sensor resistance. If resistance is zero or does not match that in Table 31, replace the
sensor.
3. After completing steps 1 and 2, power the boiler OFF. Then turn it back ON.
4. If the problem persists, replace the main control.
Er:33
CH Temperature
Sensor Open or Short
This Error Code will go away when operating temperature decreases.
If Error happens again:
1. Check CH temperature sensor. Ensure connections are secure.
2. Check CH 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.

HTP UFT-100W Specifications

General

Brand	HTP
Model	UFT-100W
Category	Boiler
Language	English