Diagnostics Alarms: Ps, Afs, Ags, Hls - Pentair ETi 250 Installation And User Manual

Troubleshooting
56
Diagnostic Alarms: PS, AFS, AGS, HLS
ERR PS
Verify that wiring is
OK and pressure tap
is not blocked. Re-
place Pressure Switch
ERR AFS
Replace Blower.
Verify that wires BM
and F1 are correctly
connected at the
terminal strip (see
Heater Connection
Diagram, Page 36).
YES
Disconnect wires F1
and F2 from Ignition
Control Module and
short them together.
Does Blower come
on?
YES
Do not jumper a safety switch
CAUTION
to remedy a failed switch.
ERR AGS or ERR HLS
Replace High Limit
Switch (HLS) or
Automatic Gas
Shutoff (AGS)
CONTINUE
If problem persists, verify proper operation of Internal Bypass Valve
and Thermal Governor, and check for Heat Exchanger blockage.
ETi 250 High Efficiency Pool and Spa Heater Installation and User's Guide
Verify that water flow rate is
above minimum required for
heater.
CONTINUE
Adjust Water Pressure Switch to close with pump running and open with
pump off.
Does Blower operate?
Disconnect Blower and check
YES
for line voltage between pins
1 and 3 of Blower Connector
on ignition try.
Check for 24 VAC between
YES
24 VAC and GND terminals
on Ignition Control Module on
ignition try. Check that IND
NO
wire is correctly connected.
Verify correct
connection of wiring between
24 VAC and IND terminals on
Ignition Control Module and
Control Board, and replace
Control Board.
Connect correctly and retry.
Does Blower start?
NO
NO
Replace Blower. Does Blower
NO
start on ignition try?
Replace Ignition Control
Module.
NOTE: ES1 is a spare and should be jumpered.
Verify that water flow rate is
above minimum required for
heater.
YES
Verify that inlet water temper-
ature is below 104° F.
NO
YES
YES
NO
NO
NO
NO
NO
NO
YES
NO
Service pump and filter to
restore proper flow.
CONTINUE
Verify that there is no block-
age in Blower intake, Heat
Exchanger, and exhaust and
that exhaust is not too long
(see "Indoor Vent Installation",
Page 22.
Verify correct connection of
wiring and that pressure taps
to AFS are OK.
Verify that vinyl tubing to AFS
and Blower is not misrouted,
kinked, disconnected, or
punctured.
Replace Air Flow Switch
(AFS).
If problem persists, replace
Blower.
Is the heater wired to 120 VAC
and the voltage selector
240 VAC (Red plug) connected
in the electrical panel?
YES
Install the 120 VAC (Blue)
voltage selector plug.
Service pump and filter to
restore proper flow. After ser-
vicing, verify proper operation
of Pressure Switch (PS).
Replace thermistor or Control
Board to correct overheating.