R WSHLD HEAT FAIL
(Caution)

R WINDSHIELD HEAT switch is set to ON and one of the conditions that follow occurs:

• R windshield heat subsystem for anti-icing cannot operate as usual because of a fault.
• R windshield and side window temperature controller (WTC) is not connected (P1 connector is off).

• Right Windshield Heater (HR7)
• Right Windshield and Side Window Temperature Controller (WTC) (A165)
• Right Windshield Heater 1 AC PWR Circuit Breakers (CB-D5)
• Right Windshield Heater 2 AC PWR Circuit Breakers (CB-D6)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-30-0463 - No Fault Found (NFF) initiative - Windshield Temperature Controller (WTC)
• Windshield Troubleshooting Report to help with windshield temperature controller NFF.

Forum Articles/Infoservice/Newsletter: None

NOTE: Before troubleshooting this CAS message, perform an interior and exterior inspection of the condition of the windshields. In support of this inspection, refer to the Windshield and side Widow booklet.

NOTE: The EICAS message R WSHLD HEAT FAIL shows in error when GROUND SERVICE is ON before electrical power is applied. This is not a fault condition.

NOTE: The left and the right windshield heat subsystems are not connected to each other but are symmetrical.

NOTE: When one of the failure message appears on the EICAS (R-L WSHLD HEAT FAIL, R-L WINDOW HEAT FAIL), if the CAIMS is active, the fault code from the unit will not be written in its memory.

In order to do so, which would help the vendor in troubleshooting the unit, we have to switch the Windshield Temp Control System (WTC) to OFF on both sides, ensure the maintenance system (CAIMS) is inactive, switch the WTC back ON and wait that the message appears again so the information is written in the memory. Comply with the steps below:

1. Record the faulty label and bit in the CAIMS,
2. Exit the CAIMS and reset the Windshield Heat switch of the affected side (this is in order to write the Non Volatile Memory (NVM ) in the unit.
3. Wait until the CAS message reappears

   1. If it reappears, write down the faulty label and bit on the MRA. (Material Return Authorization)
   2. If it doesn't reappear, the fault is considered as a nuisance.

1. Select related CAIMS message below:
   Select Item:3041000IN - R WINDSHIELD TEMP CONTROLLER3041001IN - R WTC FAIL WSHLD CH W/O REGUL3041004IN - R WTC FAIL WSHLD CHANNEL3041010IN - R WSHLD SENSOR/WIRING [SHORT]3041016IN - R WHSLD HEATER OVERCURRENT3041017IN - R WSHLD HEATER/WIRING [OPEN]3041018IN - R WSHLD HEATER/WIRING [SHORT]3041019IN - R WSHLD SENSOR/WIRING [OPEN]3041020IN - R WSHLD TEMP CNTRL INPUT POWER