34
TROUBLESHOOTING
PART 8: TROUBLESHOOTING
(CONTINUED)
Code
Description
Duration
Corrective Action
E00
High Limit Exceeded
50 Sec.
1. Try reset, if F00 repeats,
create a demand for hot
water
(
n
DANGER: use
caution to prevent burn
injury)
If water is above
194° test upper and
lower temperature
sensor with an
ohmmeter. (Refer to
resistance chart, this
section.) Replace bad
sensor. If water is below
194° test high limit
safety switch (see #15)
pg. 37 and wiring with
ohmmeter. Switch
should be closed at this
point, if not, replace
switch.
2. If unit did reset
successfully, let the
PHOENIX run and go
into the status menu to
check the upper and
lower temperature
sensor. If either reading
displayed does not
make sense, check
appropriate sensor with
ohmmeter. (Refer to
resistance chart this
section.) Replace bad
sensor. Do an OHMs
reading on both sensors
to check continuity.
E13
Combustion Fan
Speed Low.
The combustion air
fan speed less than
70% of expected.
60 Sec.
1. Check the combustion
air fan wiring.
2. Replace the combustion
air fan.
3. Replace the control
board.
E14
Combustion Fan
Speed High. The com-
bustion air fan speed
is more than 130% of
expected.
60 Sec.
1. Check the combustion
air fan wiring.
2. Replace the combustion
air fan.
3. Replace the control
board.
PR0
Low Water Cut-Off
Until
Corrected
1. Assure that the system
pressure is above 10
psig.
2. Check for leaks in the
system piping.
FLU
Blocked Vent Pressure
Switch Open
Until
Corrected
1. Assure that the vent is
not blocked
2. Check the blocked vent
pressure switch opera-
tion by applying a
jumper.
(If the switch is not
functioning properly,
replace it.)
Table 8-2: 925 Control Board Error Codes
Table 8-1:Phoenix Resistance
Table for Supply Temperature
Sensor
Phoenix Resistance Table for
Supply Temperature Sensor
High/Low Temp.
Sensor Temp. (°F)
Resistance
(ohms)
32
32550
41
25340
50
19870
59
15700
68
12490
77
10000
86
8059
95
6535
104
5330
113
4372
122
3605
131
2989
140
2490
149
2084
158
1753
167
1481
176
1256
185
1070
194
915
202
786
212
667
