37. Check the discharge and suction pressures on the manifold
gauge set. Refer to the
for R744 Pressure-
Temperature Chart.
38. Ensure that User Selectable ML3 codes 27-37 are set to the
customer specific default values to be advised by the
customer. Factory default settings are below.
39. Initiate Auto 2 PTI.
40. During pull-down, check the unit for unusual noise /
vibrations (i.e. loose connections). If found, investigate and
repair.
41. Allow the unit to complete testing. Refer to the operation &
service manual for any failed PTI test and repair.
42. Perform an Upper Vent Position Sensor calibration (optional
equipment).
a. Rotate the vent to the 0 CMH / CFM position. Cd45 will auto
-
matically display.
Code
Title
Default
Options
Cd27
Defrost Interval
Auto
Auto, Off, 3, 6, 9, 12,
24
Cd28
Standard
Temperature Units
Celsius
F, C, --- (lockout op
-
tion)
Cd29
User Selectable
Failure Response
Code
d = Full Sys
-
tem Shutdown
A = Evap Fan Only
d = Full System
Shutdown
Cd30
In-Range
Tolerance
4 = ± 2.0°C (±
3.6°F)
1 = ±0.5°C (±0.9°F)
2 = ±1.0°C (± 1.8°F)
3 = ±1.5°C (± 2.7°F)
4 = ±2.0°C (± 3.6°F)
Cd32
System Current
Limit
21 Amps
15, 17, 19, 21, 23
Cd33
Humidity Setpoint Option - Refer
to CnF04
-
Cd35
Bulb Mode
Option - Refer
to CnF28
----, nOr, bULb
Cd36
Evaporator Fan
Speed
Bulb Mode
----, Alt, LOW, HI
Cd37
Variable DTT
Setting
Bulb Mode
----, nOr
