Fisher FHIF-WHS-120CE3, Service Manual

Page: 74 / 75

R32 ATW Service Manual
72
interfere, such as lifts, large power transformers, etc. To add
a barrier to protect the unit or to move the unit to the other
place.
E2 T1 fault of water outlet temperature
sensor 1. The T1 sensor connector is loosening. Reconnect it.
2. The T1 sensor connector is wet or there is water in.
Remove the water, make the connector dry. Add waterproof
adhesive.
3. The T1 sensor failure, change a new sensor.
E5 Outdoor unit fault Please see the error code in outdoor unit.
E6 T7 fault of DHW tank water
temperature sensor 1. The T7 sensor connector is loosening. Reconnect it.
2. The T7 sensor connector is wet or there is water in.
Remove the water, make the connector dry. Add waterproof
adhesive.
3. The T7 sensor failure, change a new sensor.
E7 Tw_in fault of heat exchanger inlet
water temperature sensor 1. The sensor connector is loosening. Reconnect it.
2. The sensor connector is wet or there is water in. Remove
the water, make the connector dry. Add waterproof adhesive.
3. The sensor failure, change a new sensor.
E8 Tw_out fault of heat exchanger outlet
water temperature 1. The sensor connector is loosening. Reconnect it.
2. The sensor connector is wet or there is water in. Remove
the water, make the connector dry. Add waterproof adhesive.
3. The sensor failure, change a new sensor.
E9 Communication fault between
hydronic module and wired controller 1. Wire doesn’t connect between controller and unit.
Connect the wire.
2. Communication wire sequence is not right. Reconnect the
wire in the right sequence.
3. Whether there is a high magnetic field or high power
interfere, such as lifts, large power transformers, etc. To add
a barrier to protect the unit or to move the unit to the other
place.
P0 EEPROM protection 1. The EEPROM parameter is error, rewrite the EEPROM
data.
2. EEPROM chip part is broken. Change a new EEPROM
chip part.
3. Main PCB is broken, change a new PCB.
P1 Protection for large temperature
difference of inlet and outlet 1. Check that all shut off valves of the water circuit are
completely open.
2. Check if the water filters need cleaning.
3. Charging water
4. Make sure there is no air in the system (Purge air).
5.
Check on the manometer that there is sufficient water
pressure. The water pressure must be >1 bar (water is cold).