
42339 rev A1
03/06/20
20
Manufactured under one or more of these patents. U.S. Patents: 5332944, 5361215, 5550753, 5559720, 5,883,459, 6253227, 6282370, 6590188, 6976052,
6965815, 7030343, 7,417,834 b2, Canadian Patent: 2342614, Australian patent: 2373248 other patents both foreign and domestic applied for and pending. All
material copyright of Balboa Water Group.
Heater-Related Messages
H T R
F L O W
L O S S
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H T R
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H T R
M A Y
B E
D R Y
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W A I T
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H T R
D R Y
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H T R
T O O
H O T
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P R E 5
B T T N
T O
R 5 E T
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Heater Flow is Reduced (HFL) – MO16
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 min. See “Flow Related Checks” below.
Heater Flow is Reduced (LF)* – MO17
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, you must press any button to reset and begin heater start up.
Heater may be Dry (dr)* – MO28
Possible dry heater, or not enough water in the heater to start it. The spa is shut down for 15 min. Press any button to reset the heater
start-up. See “Flow Related Checks” below.
Heater is Dry* – MO27
There is not enough water in the heater to start it. The spa is shut down. After the problem has been resolved, you must press any button
to reset and restart heater start up. See “Flow Related Checks” below.
Heater is too Hot (OHH)* – MO30
One of the water temp sensors has detected 118°f (47.8°C) in the heater and the spa is shut down. You must press any button to reset
when water is below 108°f (42.2°C). See “Flow Related Checks” below.
A Reset Message may Appear with other Messages.
Some errors may require power to be removed and restored.
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, some equipment may occasionally turn on to
continue monitoring temperature or if freeze protection is needed.
* This message can be reset from the topside panel with any button press.