Table 19: Program Key Limits And Default - York YLAA0041 Installation Operation & Maintenance

Section 7: Unit controls
Service mode
Use the Service Mode to view all the inputs and enable
or disable all the outputs on the unit, except the com-
pressors. Some of the internal timers and counters are
viewable and modifiable in the Service Mode. To enter
the Service Mode, turn off the unit switch and press
PROGRAM, ↑, ↑, ↓, ↓, and ENTER in sequence. The
Service Mode times out after 30 minutes and returns to

Table 19: Program key limits and default

Program value
Data logging mode
Data logging timer
(1 s Inc./Dec.)
Fan speed control (single speed (CE) and
standard (NA) use staged fan Control)
Two comp fan speed ref. 1 (VSD Fans)
(1 Inc.)
Three comp fan speed ref. 1 (VSD Fans)
(1 Inc.)
Fan ramp speed (VSD Fans)
(0.5 Inc.)
Sys 1, 2 fan stage operation (two speed fans)
(1 Stage Inc./Dec.)
Compressor soft start
Refrigerant select
Expansion valve type
Remote temp reset option
Remote inputs service time
(1 min Inc./Dec.)
Feature set
(R-410A/R-454B)
Evaporator pump control
Evaporator pump total run hours (R-410A/
R-454B chiller or heatpump)
(1 Inc./Dec. per entry position)
Control Mode
160
normal control. The user can disable the Service Mode
by turning on the unit switch or by powering off and on
the 115 VAC.
The Imperial units are exact values. The
Metric units are approximates.
Low limit High limit
— —
1 s 60 s
— —
10% 99%
10% 99%
0.5 %/s 6.0 %/s
Number of
0
fan stages
— —
— —
— —
— —
5 min 60 min
— —
— —
0 99999
— —
Form 150.72-ICOM6
Issue date: 12/19/2023
Options
OFF or ON
—
SINGLE SPEED or
STANDARD
YLAA TWO SPEED SINGLE SPEED
FANS
YLAA VSD FANS
—
—
—
—
DISABLE or
ENABLE
R-22, R-407C,
R-410A, or R-454B
THERMOSTATIC or
ELECTRONIC
ELECTRONIC
DISABLE or
ENABLE
—
NORTH AMERICAN
NORTH AMERICAN
or EUROPEAN
(R-410A/R-454B
Chiller or Heatpump)
EXTERNAL,
KIT PUMPS 1 or
KIT PUMPS 2
—
R-410A/R-454B
LEAVING or
RETURN
Default
OFF
1 s
10%
10%
1.0 %/s
0
DISABLE
R-410A
DISABLE
15 min
EXTERNAL
0
LEAVING
Johnson Controls