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Status and Diagnostics
The heaters are programmed to display a variety of status
and diagnostic messages, depending on the operating
conditions.
The following heat status messages are displayed in Pool,
Spa, and Remote modes when there are no active fault
conditions.
Display
Heating
Call-for-heat established, flame present.
Spark
Spark operating.
No Demand
Heat demand is satisfied.
Table L.
Heater Status Messages - No Active Faults
The following conditions are displayed in Pool, Spa and
Remote modes.
Display
Thermistor temperatures disagree by
Sensor Failure
more than 2°F (1°C).
Thermistor sensor failed open. Below
Sensor Open
-20°F (-29°C).
Thermistor sensor failed short. Above
Sensor Short
217°F (103°C).
Board is sensing flame when
Flame w/o CFH
both main and pilot valves are
commanded shut.
Pilot gas valve output is not in
PV Output Fault
commanded state.
Main gas valve output is not in
MV Output Fault
commanded state.
Voltage is sensed at the Lo NOx
LoNox Tab Fault
terminal on a non -Lo- NOx heater
(Lo NOx tab is intact).
Internal Fault
Board fault, replace board.
Memory fault, reset setpoints, replace
EEPROM Fault
board if fault does not clear.
Time clock/fireman switch circuit is
Clock/Fireman Sw
open.
Low Temp
Water temperature below 36°F (2°C).
Lockout
Table M. Heater Status Messages - Active Faults
26
Condition
Condition
The following conditions are displayed only while there is a
demand for heat present.
Display
Water Sw Open
Water pressure switch open.
Vent/Field
Vent spill switch/field switch #1 open.
Sw #1
High limit 1 open. On ASME units, this
Hi Limit 1 is Open
is a manual-reset device. Press the
MODE button to reset
High limit 2 open. On ASME units, this
Hi Limit 2 is Open
is a manual-reset device. Press the
MODE button to reset
Rollout Sw Open
Rollout switch open.
Field-supplied flow switch/field switch
Flow/Field SW #2
#2 open.
Alternating with "No pilot sensed"
- Pilot flame not established within the
Ignition Lockout
required time (15 sec or 90 sec).
(Propane Tab
Alternating with "Main Ign Failure"
Broken)
- Pilot flame lost during the 8 second
trial to ignite the main burner.
Ignition Failure
Alternating with "No pilot sensed"
(Propane Tab Not
- Pilot flame not established within 90
Broken)
seconds.
Alternating with "Main Ign Failure"
Ign 60-min Delay
- Pilot flame lost 4 times within the 8
(Propane Tab Not
second trial to ignite the main burner.
Broken)
Heater will lockout for 60-minutes
before retrying.
Table N.
Heater Status Messages - Demand for Heat
High Limit Event
Figure 38. High Limit Events
TO AVOID HIGH LIMIT EVENTS:
1.
Confirm circulation pump is running during heating
cycle.
2.
Pump should shutoff a minimum of 5 minutes after
heating cycle ends.
Failure to follow these steps may cause residual heat
buildup - triggering a High Limit event.
If issues persist, contact your service installer.
Condition
ASME Units
ONLY
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