Question about Coleman Mach 15 Air Conditioner

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Coleman 15k will not come on

My coleman 15k with the hand held remote will not come on- the green light in the unit is on also i pushed the button on the ceiling panel and did not come on - worked ok 2 days ago - how do i ck this unit - pluged into 30 amp - and breaker ok

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  • kerrycollins Aug 29, 2008

    System is getting power but will not respond to any thermostat controlls.

  • broken 1 Mar 26, 2009

    my coleman 15k with the hand held remote will not come on- the green light in the unit is on also. Ipushed the button on the ceiling panel and did not come on - worked ok yesterday- hooked to 50 amps.. checked all power connections. "brain box" will beep and click when the power is turned on or off. also, heater or fan settings will not work....

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Here is the troubleshooting guide for your unit. Hope this helps.

TROUBLE SHOOTING GUIDE
TROUBLESHOOTING
Symptom Remedy
1. Remote does not turn on system
- Check and replace remote batteries if the display fades while
any button is activated or no display is present. - Point remote towards IR receiver during transmission. 2. System does not turn on, no green LED & no beep
- Check wiring. (see "installation instruction")
- Check modular cable to receiver.
- Check diagnostic LED status in the upper unit control box.
3. System does not turn on even when receiver green LED is on.
- Low or over voltage condition, check diagnostic LED status in the upper unit control box.

4. Fan runs but no cold air.
- Evaporator temperature sensor reaches low limit, defrost mode.
- Check diagnostic LED status in the upper unit control box.
5. System runs continuously in the cool mode
- Remote was set for "I feel" mode and is left in a heated environment (sun etc.)
6. System runs continuously in the heat mode
- Remote was set for "I feel" mode and is left in a cool environment

1. Diagnostic LED (green)
(Note: Located on the control board in the upper unit control box.)
a) The LED is on when the 12VDC is adequate and communications are
present.
b) The LED is flashing fast and steady when in the freeze mode. Evaporator has frozen and the freeze proctection switch is engaged.
c) The LED is flashing slow and steady when the delay on break timer is
activated.
d) The LED is flashing 1 cycle on and off for one second with high or low
12VDC. Check the incoming 12VDC power for OK.
e) The LED is flashing 2 cycles on and off for one second with a
communication problem. Problem with the control board in the unit and the remote.

Hope this helps.

Jeff

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Posted on Jul 04, 2009

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