35
P/N S794 Rev. H 8-11-14
MAX-E-THERM
®
Pool and Spa Heater Installation and User’s Guide
Diagnostic LED
1 Flash
- Air Flow Fault
2 Flashes
- Flame No Call for Heat
3 Flashes
- Ignition Lockout
Flame Current
Check Point
Section 3. Operation
Figure 33.
SAFETY CONTROLS,
(cont’d.)
OPERATION OF IGNITION MODULE
The Ignition Module
, (see
Figure 33
),
is microprocessor based
and operates on 24VAC supplied by the transformer. The control
utilizes a microprocessor to continually and safely monitor, analyze,
and control the proper operation of the gas flame holder. The module
with the presence of the flame sensor, using flame rectification,
allows the heater to operate.
OPERATING THE CONTROL PANEL
The five operating switches are:
POOL ON
Press this button to govern heater operation by the
pool temperature setting.
SPA ON
Press this button to govern heater operation by the
spa temperature setting.
HEATER OFF
Press this button to switch off the heater.
V
V
V
V
V
TEMP
Press this button to raise the temperature setting.
W
W
W
W
W
TEMP
Press this button to lower the temperature setting.
To toggle the display between degrees Centigrade (°C) and degrees
Fahrenheit (°F):
1.
Turn the Operating Control OFF.
2.
Press
V
TEMP
or
W
TEMP
for 5 seconds. The display will flash
once and change modes (°C to °F or vice versa).
3.
Turn the Operating Control ON.
When either the
V
TEMP
or
W
TEMP
buttons are depressed, the digital
display will indicate the temperature setting. After five seconds, the display
will return to the actual pool/spa temperature.
In addition to the digital temperature display, there are five indicator lights:
The
POOL ON
light indicates that the pool water temperature is governing operation of the heater.
The
SPA ON
light indicates that the spa water temperature is governing operation of the heater.
The
HEATING
light comes on and stays on when the burner is firing. This light should be on whenever the burner is on.
It blinks when the heater is calling for heat but not firing. If this light is on but the burner fails to come on, one of the “service”
lights should come on, indicating a fault in the system.
The
SERVICE SYSTEM
light indicates that there is insufficient water flow to the heater. If the pump is operating, this
usually indicates that the filter and/or skimmers should be cleaned (some filters may require back-washing). If the light
remains on after the filter/skimmers have been serviced, the system should be checked by a qualified service technician.
The
SERVICE HEATER
light indicates a fault in the heater or its controls. If this light comes on, shut down the heater
(See “TO TURN OFF GAS TO THE APPLIANCE” on
page 33
), and have a qualified service technician check the system.
WARNING
Risk of explosion or fire causing burns or death if safety interlocks are disabled. DO NOT
attempt to operate heater
when SERVICE HEATER light is on or if blower or burner will not start. Instead, follow instructions under “To Switch Off Gas to
the Appliance,” and call a qualified service technician to repair unit.
Digital Temperature
Display
Temperature Up/Down
Dual Temperature
Controls
System Operation
Indicator Lights
FILTER
PUMP
AUX
1
AUX
2
HIGH SPEED
LOW SPEED
BOOSTER PUMP
Digital Temperature
Display
Temperature Up/Down
Dual Temperature
Controls
System Operation
Indicator Lights
Operating Control for HD models
Operating Control for all models except HD models
Figure 34.
(See
page 30
for the External Control Interface for HD models.)
