Marquis Crown Summit Owner's Manual page 34

HOT TUB CONTROLS
HEATER-RELATED MESSAGES
The water flow is low – M016**
There may not be enough water flow through the heater to carry the heat away from the heating
element. Heater start up will begin again after about 1 minute. See "Flow Related Checks" below.
The water flow has failed* – M017**
There is not enough water flow through the heater to carry the heat away from the heating
element and the heater has been disabled. See "Flow Related Checks" below. After the problem
has been resolved, reset the message*.
The heater may be dry* – M028**
Possible dry heater, or not enough water in the heater to start it. The spa is shut down for 15
minutes. Reset this message* to reset the heater start-up. See "Flow Related Checks" below.
The heater is dry* – M027**
There is not enough water in the heater to start it. The spa is shut down. After the problem
has been resolved, you must reset the message* to restart heater start up. See "Flow Related
Checks" below.
The heater is too hot* – M030**
One of the water temp sensors has detected 118°F (about 48°C) in the heater and the spa is shut
down. You must reset the message* when water is below 108°F (about 42°C). See "Flow Related
Checks" below.
Flow-related checks
Check for low water level, suction flow restrictions, closed valves, trapped air, too many closed
jets and pump prime. On some systems, even when spa is shut down by an error condition, some
equipment may occasionally turn on to continue monitoring temperature or if freeze protection is
needed.
SENSOR-RELATED MESSAGES
Sensors are out of sync – M015**
The temperature sensors may be out of sync by 3°F. Call for Service if this message does not
disappear within a few minutes. Sensors are out of sync -- Call for service*
– M026**
The temperature sensors ARE out of sync. The fault above has been established for at least 1
hour. Call for service.
Sensor A Fault, Senor B Fault
– Sensor A: M031**, Sensor B: M032**
A temperature sensor or sensor circuit has failed. Call for service.
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