Service Manual

Fault Code
Displayed
Condition Check
F10
Lower heating element failure. Control energizes lower
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Check respective heating element and wiring connections at element and control. Use
service mode to cycle element and check current draw. Control assembly may have failed
otherwise.
F11
Upper heating element failure. Control energizes Upper
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F12 Lower heating element failure. Check respective heating element and replace as required. Use service mode to cycle
element and check current draw. Control assembly may have failed, otherwise.
F13 Upper heating element failure.
F16**
Mixing Valve Outlet DC TCO tripped. Outlet DC TCO reading
is low, indicating TCO tripped.
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correction. Mixing valve, sensors, or electronic control may require replacement to correct
over temperature condition.
F17
Jumper wire missing on non-EMV model. (12V not present) Non-EMV models: Ensure non-EMV model jumper is present and connected correctly. Install
Jumper wire, if missing (part of J802 connector plug).
F18**
Mixing Valve Failure. Means mixing valve is not able to control
outlet temperature and NOT due to elevated inlet temperature
or ambient. Disables mixing valve mode and controls T2 to
user setpoint until serviced (normal mode).
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control are correct. Replace mixing valve components if connections are correct.
F19
Runaway Heat Source (leads to a ECO trip). Idle Over-
Current (Current present when no loads are on.).
If ECO trips with F19 Fault, then defective relay on board. Replace control board and
manually reset ECO. If ECO trips with no F19 fault, then defective thermistor.
F30
T1 tank temperature sensor failure (open/short). T1 Sensor is
beyond normal 32°F - 180°F temperature range.
Check T1 sensor mounting, wiring and resistance. Use service mode to monitor T1 sensor
temperature. If T1 sensor checks OK, control assembly may have failed.
F31
T2 tank temperature sensor failure (open/short). T2 sensor is
beyond normal 32°F - 180°F temperature range.
Check T2 sensor mounting, wiring and resistance. Use service mode to monitor T2 sensor
temperature. If T2 sensor checks OK, control assembly may have failed.
F32 or
F33
T1 or T2 tank temperature sensor failure. Thermistor accuracy
issue.
Check both T1 and T2 thermistors wiring and mounting to determine cause for discrepancy.
If no assembly issue found, monitor thermistor readings in service mode (comparing to actual
water temperature) and replace inaccurate thermistor.
F38**
T6 EMV Water Outlet temperature sensor failure (open/short
or T6 sensor is beyond normal 32°F - 180°F temperature
range.
Check T6 sensor mounting, wiring and resistance. Use service mode to monitor T6 sensor
temperature.
F39**
T7 EMV Water inlet temperature sensor failure (open/short or
T7 sensor is beyond normal 32°F - 180°F temperature range.
Check T7 sensor mounting, wiring and resistance. Use service mode to monitor T7 sensor
temperature.
F40
Current Sensor Failure (current sensor open/short) &KHFNZLULQJWRFRQ¿UPQRGDPDJH,IGDPDJHGUHSDLUUHSODFHVHQVRUDQGZLULQJDV
required. If no visible damage, replace control (making sure black L1 wire is threaded
through sensor).
F41*
Anode miswired conditioned or shorted to ground.
Check to ensure the tank is full of water (fault may occur if tank is empty). Check anode
and anode wire connections (on the board and at the anode rod). Check if any thermistor
connections are shorted to earth ground. Check if anode is shorted to tank.
F43
Leak Detector Sensor Failure - open/short (when using leak
detection accessory module)
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module and wiring as required.
F44
Adjacent pins on micro out of range (T1 vs. T2) &RQ¿UPUHVLVWDQFHRI7DQG7WHPSHUDWXUHVHQVRUVDUHFRUUHFWDQGQRGDPDJHWRZLULQJ
Replace thermistors if out of range, otherwise replace electronic control.
F45
Adjacent pins on micro out of range (T6 vs. T7) &RQ¿UPUHVLVWDQFHRI7DQG7WHPSHUDWXUHVHQVRUVDUHFRUUHFWDQGQRGDPDJHWRZLULQJ
Replace thermistors if out of range, otherwise replace electronic control.
F60 AC Power detection failure Agency required fault. No Service action required.
F61 Tank regulation fault Agency required Fault. No Service action required.
F62
Incoming cold water too hot. Check accuracy of inlet water temperature. Unit may have supplimental water heater in
circuit (such as solar water heater).
F63 or
F64**
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control are correct. Replace mixing valve components if connections are correct.
F70*
Anode Depleted. Anode text is illuminated, and the audible
alarm is sounding. The control has calculated that the anode
rod has been mostly consumerd or the time in operation has
exceded the replacement timeline threshold.
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application. Alarm can be silenced by pressing Anode “Hold to Reset” button once. Depress
and Hold reset button for 5 seconds after anode replacement (resets anode life to 100%).
F71
Current transformer miswired. F10 and F11 fault codes have
all occurred during the same heating cycle.
Check that black L1 wire passes through the current sensor and that current sensor
connector (J301) is plugged in. If correct (and there is no damage to wiring), the control cord
needs to be replaced.
F72
Low line voltage during operation. Sagging voltage occurs
over time, not at power-up, like fault F76.
Check incoming line voltage within +10/-15% of either 208 or 240 VAC, depending upon
power supply. The detected voltage can be viewed in “Monitor Mode”. Check heating
elements are not shorted to ground.
F76
The voltage is too low at power-up. The control monitors the
input line voltage, and if the voltage is below 155V, the fault
code will be displayed.
Check electrical supply line connections. Voltage should measure within +10/-15% of either
208 or 240 VAC, depending upon power supply, The detected Voltage reading can be viewed
in “Monitor Mode”. Check heating elements are not shorted to ground.
F77
Stuck Key fault. This indicates there is a button on the front
panel that is stuck down (longer than 30 seconds). This button
is inoperable. Other buttons work normally. If the button
becomes free, the fault code will clear by itself.
Check to see if all buttons are operable. Ensure control board is properly seated and
mounting screws are not overtightened (loosen screws and hand tighten lightly). Replace
control board, if issue persists.
F78
Water Leak Detected (when using leak detection accessory
module).
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F90
E2 personality module is unplugged. Unit will continue to
operate using previously stored personality on Control Board.
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board or replace if damaged. Personality can be entered in “Personality Mode”, if PCB
information is not correct.
F91 New E2 plug detected (0 personality value). Cycle Power. E2 module will be programmed with stored information from control board.
F92
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are not the same).
No service action required. Control will update based on E2 module information.
F93
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replaced and neither have an assigned Personality).
Assign correct Personality within Personality Mode (see Personality Table for correct ID).
F94
WiFi Daughter Board Failure &RQ¿UP:L)LLVDYDLODEOHDQGDWWHPSWWRUHHVWDEOLVKFRQQHFWLRQWKURXJK$33
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GEAppliances.com/connect). Check terminal connection J602 to WiFi board. Replace WiFi
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* Applicable to models with sensing Anode
**Applicable to models with integrated Electronic Mixing Valve (EMV)
31-6000228 Rev. 1 07-20
Mixing Valve
Thermostat
Cut Out (155F)
One Shot
Cold Water
ÀH[KRVH
EMV stepper
motor &
drive asm
Anode rod
access
EMV Front
/ Rear
Shrouds
ECO HI
LIMIT(180F)
Resettable
1
2
3
4
1
11
L1 L2
UPPER ELEMENT
LOWER ELEMENT
5500W 10.5 ё ~22.9 A
5500W 10.5 ё ~22.9 A
M403
M401
•
NO
•
COM
M402
•
NO
•
COM
•
NC
K402
BLACK
RED
BLACK
BLUE
RED
BLUE
K401
••
•
•
•
•
•
•
•
•
•
•
•
•
•
T7
T6
MIXING
VALVE
ϯϱɏ
TCO
AQUA
AQUA
RED
RED
BLUE
BLUE
RED
RED
ORANGE
AQUA
BROWN
YELLOW
RED
BLACK
BLACK
BLACK
BLACK
e2 Personality
module
J802
1
11
•
•
•
•
•
•
•
•
•
•
•
J802
J808
YELLOWLine 1
Line 1
PURPLE
J801
•
•
•
•
•
•
T1
T2
Sensor Output
Sensor Output
5VDC
5VDC
Sensor Output
Sensor Output
5VDC
5VDC
5VDC
12.5VDC Pulsing
12.5VDC Pulsing
12.5VDC Pulsing
12.5VDC Pulsing
12.5VDC Constant
TCO Status
6
1
•
•
ANODE
J807
•
GND
GREEN
RED
•
•
J301
WHITE
BLACK
SENSOR
CURRENT
•
•
J602
RED
WHITE
WIFI
MODULE
•
•
NAVY
BLUE
1
4
1
2
2
1
MAIN BOARD
J403
Non-EMV models: Use
J802 Jumper plug
Line 2
Line 2
(if equipped)
(if equipped)