Troubleshooting - Kenworth Y53-1024 Operator's Manual

Concern
Parked truck will not get Storage core not
cool. charged.
Parked truck will not get Lack of cool air out of
cool. vents.
Parked truck will not Storage core is depleting
stay cool for 8-10 hours. too quickly.
Parked truck will not get Lack of hot air out of
warm. lower heater vent.
- 40 -

TrOUBlESHOOTInG

Possible Cause
1) Make sure chargeable dash switch is enabled.
2) Make sure the inverter switch is in the ON position.
3) Make sure the Protection Unit circuit breaker is not tripped, if necessary, reset.
4) Air conditioning component service/refrigerant level check.
(Please note if outside temperature is below 55°F, compressor will not turn on.)
1) Make sure air conditioning mode is selected.
2) Make sure blower is in the ON position.
3) Make sure temperature control is set in the blue zone.
4) If in recirc mode, make sure recirc vents are open.
5) Service fresh air/recirc filter.
6) Check coolant level.
7) Component service.
1) Make sure temperature control is set in the green zone.
2) Make sure sleeper pass-through curtain is closed and all window coverings are installed.
1) Make sure heating mode is selected.
2) Make sure temperature control is set in the red zone.
3) Check for heater diagnostic blink codes at the heater mode selection LED.
4) Make sure heater inlet in tool compartment is not blocked.
5) Make sure fuel and exhaust lines are not blocked.
6) Component service
Remedy
Y53-1024 12/06
Troubleshooting
Kenworth