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TROUBLESHOOTING
18) Check for Contact Failure at the Starter Drive System
19) Inspect Exhaust Water Drain Heater
[ Unit with drain heater kit only ]
1. Check heater output
1) Select "Actuators output condition/individual actuating (code No. 20)" in the check mode of the board mainte-
nance functions. Then turn ON "Exhaust water drain heater".
2. Check heater resistance value
1) Turn OFF the electric leakage breaker.
2) Check the heater resistance value at CN3[1]-[4] on the cold district PCB.
3) Disconnect the heater connector and check the resistance between both ends of the connector.
A contact failure at the terminal of the starter drive system may lead to an engine stall caused by noise.
Check for looseness.
In particular; ① Capacitor connection terminals (2 places)
② Diode connection terminals (2 places)
③ Body ground connection terminal section (both ends)
④ Starter transformer cord connection terminal section (both ends), etc.
①
④
②
③
To starter transformer
To body ground
To compressor bracket
To starter B terminal
④
③
2) Measure the voltage between both ends of the
connector with the heater connected, and check
that 200 V DC is applied.
3) Select "Actuators output condition/individual
actuating (code No. 20)" in the check mode of
the board maintenance functions. Then turn OFF
"Exhaust water drain heater".
4) Measure the voltage between both ends of the
connector with the heater connected, and check
the voltage is 0 V.
Exhaust water drain filter heater
Exhaust water drain hose heater
Measure point
Standard resistance value
[ 8 TON ] [ 15 TON ]
On the cold district PCB (combined value) 421 Ω 476 Ω
Exhaust water drain filter heater 833 Ω 667 Ω
Exhaust water drain hose heater 851 Ω 1,667 Ω
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