Cockpit and Cabin Trim Air Valve (Affected valve secured in the closed position)

21-63-02A	Cockpit and Cabin Trim Air Valve (Affected valve secured in the closed position)

Applicable to: -

- During cockpit preparation

When one trim air valve is secured in the closed position:

The zone controller closes all trim air valves and the hot air pressure regulating valve at each power up.

To recover normal operation of the operative valves, apply the following procedure after air conditioning pack start:

If the COND HOT AIR FAULT alert is displayed on the EWD, reset the following C/Bs:

AIR COND/ZONE TEMP CTL/115 VAC/SYS 1 (122VU V17) C/B

AIR COND/ZONE TEMP CTL/115 VAC/SYS 2 (122VU V18) C/B

AIR COND/ZONE TEMP CTL/28 VDC/SYS 1 (122VU V19) C/B

AIR COND/ZONE TEMP CTL/28 VDC/SYS 2 (122VU V20) C/B

If the COND HOT AIR FAULT alert is still displayed on the EWD:

- In flight

If the affected zone temperature becomes uncomfortable:

21-63-02A	Cockpit and Cabin Trim Air Valve (Affected valve checked closed)

Applicable to: -

- During cockpit preparation

On the COND SD Page page, check that the affected trim air valve is closed.

- In flight

If the affected zone temperature becomes uncomfortable: