Maytag Amana VZC20 Service And Troubleshooting page 88

SERVICING
SET 7-SEGMENT MODE DISPLAY TO PUMP DOWN
Please follow the following sequence to enter PUMP
DOWN to accumulate the refrigerant to outdoor unit.
Do not operate COOL ON or HEAT ON mode to enter
PUMP DOWN. Before starting the PUMP DOWN operation,
change indoor fan trim, delay and profile back to default
and stop electric heater and gas furnace. Remove if no trim
feature. In this operation, the gas and liquid service valve
should be opened.
1. Set 7-segment display to SCREEN 4 (SETTING MODE
2) Setting No. 8 and change the display from "-01" to
"-00". System will then automatically start PUMP DOWN
operation.
For information on how to set 7-segment display, see the
section SETTING THE MODE DISPLAY in this manual.
2. Approximately one minute later, the compressor should
start operating. Check the amperage at the compressor
wiring to see the compressor operation status. Unit dis-
play error code E11 (System verification Test) once the
PUMP DOWN operations starts.
3. Close liquid service valve approximately two minutes
after compressor has come on.
4. Compressor will come to a stop automatically. Close the
suction service valve immediately after the compressor
stops. After completion of PUMP DOWN, unit shows
error code "E11".
NOTE: Refrigerant cannot be collected to the outdoor unit
completely if the system is overcharged or if there is a delay
in closing the liquid service valve and suction service valve.
Evacuate the left over refrigerant from the system using a
recovery machine.
SET THERMOSTAT TO CHECK SYSTEM STATUS
1. Follow the sequence 1. to 5. of Set Thermostat to
Adjust Indoor Air CFM trim.
2. Select STATUS.
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CTK04 ADDENDUM