Bosch GreenTronic 7000 T - Troubleshooting

Installation and Operating Instructions
Bosch GreenTronic 7000 T Hybrid Electric Water Heater - BTC 755003301 A (03.2024)
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8 Troubleshooting
Problem Possible Cause Corrective Action
Display is not powered
No power to the water heater
1. Check for tripped breaker, restore power
2. Check voltage at terminal block (~208-240V)
No power to the display
1. Check connection on main board to display
2. Check if display connection has power
3. If power from mainboard connection is available, replace display board
TCO tripped
1. Understand cause of TCO activation
2. Reset TCO
Board failure Replace failed board
No hot water
No power
1. Check for tripped breaker, restore power
2. Check voltage at terminal block (~208-240V)
3. Check if display has power, if not see above
Vacation mode is active
1. Check operation mode on display for VACATION
2. Change to desired mode
Error Code
1. Error code is displayed
2.Check error code table and follow corrective actions
Water heater has not recovered
1. Check current temperature on display
2. Change operation to mode with higher recovery rate, refer to section "Selecting Operation Mode"
Plumbing Issues Check for plumbing issues (e.g. crossover, bad mixing valve, etc.)
Running out of hot water
Wrong operation mode selected Select mode with higher recovery rate
Setpoint temperature too low Raise setpoint, refer to section "Water Temperature Setting"
Demand response is active Check if DR is activated, refer to section "Demand Response"
Water heater is undersized
1. Stagger hot water usage
2. Check with your installer
Temperature too high
Setpoint temperature too high Lower setpoint
Plumbing Issues Check for plumbing issues (e.g. crossover, bad mixing valve, etc.)
Water pressure too low Plumbing Issues Check for plumbing issues (e.g. closed cold water supply valve)
Smelly water Water quality issue (e.g. excessive sulfate)
Consider using an alumnium anode rod (part number: 7738007481 for 50 Gallon, 7738007482
for 80 Gallon)
Water in drain pan
Leak from drain valve
1. Verify drain valve is fully closed
2. Replace if it still leaks
Leak from water connections or condensate drain
1. Check for leaks
2. Tighten connections
3. Replace if necessary
Leak from T&P valve
1. Check for leak at T&P valve
2. Replace T&P valve
Leak from tank Inspect tank for leakage, and replace whole unit if necessary
Table 22