950-0094-revA - 8 - 26 February, 2008
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Random Time Delay Start-up
In order to prevent large electrical surges in installations where multiple units are
installed, after a power failure the unit(s) will start back up automatically after a
random time delay of 120 to 240 seconds. The unit will start back up in the
operating modes and temperature settings that were in effect prior to the power
failure.
•
The fan running continuously after the temperature is satisfied.
•
When changing functions, unit has a 3 minute time delay for the compressor start
up operation.
FRESH AIR EXCHANGE
1. Remove the front cover by pulling out at the bottom to release it, then lift it up to clear
the rail along the top of the chassis (Fig a).
2. Move the air exchange lever to the right for the OPEN position, to the left for the
CLOSED position (Fig B).
Note: The air exchange lever is normally placed in the CLOSED position. When it is moved
to the OPEN position, the unit will draw in fresh air, but the efficiency of the unit will be
lower.
SELF DIAGNOSTIC FUNCTIONS
The unit has a self diagnosis system that displays error codes on the display in case of
system failures. Please refer to the chart below for the error code definitions:
Failure Code
Content of defect
E1
Communication failure of wall thermostat
E2
Indoor coil temperature sensor failure
E3
Indoor temperature sensor failure
E4
System abnormality protection
E5
Outdoor coil temperature sensor failure
E8 Overheating
protection/Defrosting
DF Defrosting
Summary of Contents for PTAC09CH3ZX
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