Problem solving
RTG 199 HE – 6 720 811 617 (2016/01)
46
EA
No flame ionization detected with
water flow.
1. Verify that all manual gas shut off valves are open.
2. Check gas type. See fig. 2, page 7.
3. Reset error code and open a water tap to cycle the heater in an effort to purge air.
Cycling hot water tap on and off multiple times may be necessary. If heater still faults
with EA error code, have a licensed gas technician properly purge air out of the gas
line leading to the water heater.
4. Check three wire connections to ignition group on the lower front of the heat
exchanger are secure.
5. Check gas pressure. See chapter 4.15, page 33.
6. Check venting specifications are met. Improper venting may cause premature
failure of the flame sensor rod. See chapter 4.3, page 10.
7. Check that the minimum power fan speed has been adjusted to the proper value.
See page 21.
8. Observe inside the viewing window of the heat exchanger when a hot water tap is
opened. Sparking should be followed by a steady blue flame. If flame is unstable/
yellow with proper gas pressure, confirm CO
2
readings per chapter 7.5, page 39.
EC
Ionization failure during operation.
1. Check gas type, fig. 2, page 7.
2. Check three wire connections to ignition group on the lower front of the heat
exchanger are secure.
3. Verify that venting specifications are met. Improper venting may cause premature
failure of the flame sensor rod. See chapter 4.3, page 10.
4. Check gas pressure. See chapter 4.15, page 33.
5. Check and adjust CO2 readings. See chapter 7.5, page 39.
6. Check that the minimum power fan speed has been adjusted to the proper value.
See page 21.
F1
Parameter in memory not found
1. Replace ECU (Electronic Control Unit) if there are repeated errors.
F2
Internal Operations error
F3
Internal memory parameter error
F4
Internal memory error
F5
Analog test fail
F6
Gas type parameter error
E7
Appliance parameter not defined
F0
Burner Control routine state error
E5
Burner Control error
E6
Burner Control routine check sum
error
F8
Fan stopping error
1. Check primary fan cable harness
2. Check fan rotation in standby
3. Check proper function of primary fan
4. Replace ECU (Electronic Control Unit)
Display
Cause
Solution
Table 49
* By installer or service technician only.
