Mooney M20TN, Service And Maintenance Manual

Page: 280 / 1169

MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Page
Date
8
2006
Rev Date
Windshield system does not operate. Pump(s) inoperative Replenish Fluid in tanks
Inadequate Fluid content Check Pump(s) and Pump(s) wiring
Solenoid Valve(s) Inoperative Check power to Solenoid Valve(s)
Check Solenoid Valve(s)
High pressure warning – LED illumi-
nates during operation.
OAT -- COLD
--
Temperatures below --30
o
C.
--
No immediate action necessary,
monitor operation at warmer temper-
atures with Anti--Ice selected
Temperatures above --30
o
C.
--
Renew Filter Element and bleed filter
Check system for blockage
High pressure warning – LED illumi-
nates when aircraft Buss powered
up.
-- Connect Pin 10 of connector C1 to
ground (C1, Pin 1).
Check wiring from C1 Pin 10 to High
Pressure Warn Switch for continuity
Check High Pressure Warn Switch.
With no pressure applied, continuity
should exist through connections in
use.
LOW PRESSURE WARNING – (LEDs FLASH RED)
When system selected ON.
--
Check System for proper operation.
Connect Pin 2 of connector C1 to
ground (C1, Pin 1).
Check wiring from C1 Pin 2 to Low
Pressure Warn Switch (es) for conti-
nuity.
Check Low Pressure Warn
Switch(es).
With System operating, circuit
should exist through connections in
use.
When aircraft Buss powered ON
. --
Check Control Panel for fault. Repair
or replace Control Panel.
CONTROL PANEL/CONTENTS INDICATING SYSTEM FAULT
Tank Contents Display Illuminated.
--
Depress High Pressure Reset.
Amber LED illuminates:
Check Auto--dimmer Setting.
Check voltage at Control
Panel Output C2 (w/ plug dis-
connected):
Pin 1 = +5 volts
Pin 3 = -- 5 volts.
Reconnect C2 and check volt-
ages on this connector:
Pin 1 = + 5 volts
Pin 2 = Signal should vary
from 0 volts (tank empty) to + 1.8
volts (approx.) (tank full).
Pin 3 = -- 5 volts.
Repair/Replace Control Panel
Check wiring & tank contents Trans-
mitter. Correct wiring or reset poten-
tiometer.
30--12--01