Trane ComfortLink II 4TWZ0036B1000A Service Facts page 7

SUMMARY OF ALERT CODE & CHARGE ASSIST
A working Ambient Temperature Sensor
NOTES:
- LPCO Monitor
- Charge Assist (Use Ambient Sensor only) Do not revert to
External ODT Sensor if present and Ambient Sensor has failed.
- Defrost (Heat Pump Models Only) Do not revert to External ODT
Sensor if present and Ambient Sensor has failed.
- Comfort Control (ODT display)
- Aux Heat control during Defrost
- Humidifier Dew-Point Control
- Compressor Lock Out
- Aux Heat Lock Out
- Oil Return Mode
CA™ procedure allows 1 hour to get within 20 psi of "Charged" and 50 minutes to move 4 psi,
Otherwise Time Out
"CHARGED" LED (GREEN)
ON
BLINKING
"CHARGING" (STABILIZING) (AMBER LED)
BLINKING
"RECOVER" (RED LED)
ON
"ADD" (AMBER LED)
ON
is needed for the following:
FLASH RATE SUMMARY
Charge is Correct
1 sec. ON/OFF = 15-20 PSI off target
3/4 sec. ON/OFF = 10-15 PSI off target
1/2 sec. ON/OFF = 5-10 PSI off target
1/4 sec. ON/OFF = 0-5 PSI off target
1 sec ON/OFF = 6-20 minutes away from a steady operating state.
3/4 sec. ON/OFF = 5-6 minutes away from a steady operating state.
1/2 sec. ON/OFF = 2-4 minutes away from a steady operating state.
1/4 sec. ON/OFF = 1/2 - 2 minutes away from a steady operating state.
Flash 10 times = indicates that Charge Assist™ is not allowed
Exit Charge Assist™ - need to recover refrigerant
System requires refrigerant charge (Control has turned on the 24 volt AC output) Use
Charge Assist™ Tool (#BAYCAKT001AA)
LEDS (CONTINUED)
TM
The Comfort Control Wait icon
will be ON for the following:
- Minimum equipment off time (5 min.)
- During Low or High Pressure monitor
"short lockout" (5 min)
- During Power-Interrupt protection
(1 min.)
- During Charge Assist™
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