Installation manual

31
PREMIER INSTALLATION MANUAL
Fault Retry
All faults (except for low RPM fault with the ECM2 fan motor) are retried twice before fi nally locking the unit out. The
“fault retry” feature is designed to prevent nuisance calls.
Diagnostics
The Premier control board allows all inputs and outputs to be displayed on the LEDs for fast and simple control board
diagnosis (see fi eld selection DIP switches #6 and #7).
Resistance Heat Control
For units equipped with internal electric heaters, the electric heat control module contains the appropriate high-volt-
age control relays. Control signals energize the relays in the proper sequence, and the LED display board indicates which
stages are energized.
Fan Speed Control
A DIP switch on the Premier control allows fi eld selection of low and medium fan speeds for cooling in the dehumidifi ca-
tion mode or medium and high fan speeds for cooling in the normal mode (ECM2 version only).
Hot Water High Limit
This mode occurs when the hot water thermistor temperature is at or above 130°F for 30 continuous seconds. The DHW
limit status LED on the unit illuminates, and the hot water pump de-energizes. Hot water pump operations resume on the
next compressor cycle or after 30 minutes of continuous compressor operation during the current thermostat demand cycle.
Hot Water Pump Switch
When the pump switch is engaged, hot water pump operation is disabled, and the pump status LED on the unit illumi-
nates.
ECM2 Airfl ow Selection DIP Switches (SW1)
A 12-position DIP switch package on the Premier control allows the airfl ow levels to be set for low, medium and high
speed when using the ECM2 blower motor (refer to the Blower table on page 28).
Only three of the DIP switches can be in the “on” position. The fi rst “on” switch (the lowest position number) determines
the “low speed fan” setting. The second “on” switch determines the “medium speed fan” setting, and the third “on” switch
determines the “high speed fan” setting.
Standard Microprocessor Control Operation