Outdoor Units; Input Parameter Compensation And Calibration; Check Effective Judgment Controls Of Parameters; Judgment Of Exhaust Detection Temperature Change - Lennox LI036CI-180P432 Service Manual

Service Manual

Outdoor Units

1. Input Parameter Compensation and Calibration

(1) Check the ambient temperature compensation function Indoor ambient temperature compensation function.
a. In cooling mode, the indoor ambient temperature participating in computing control = (T
)
compensation
b. In heating mode, the indoor ambient temperature participating in computing control= (T
)
compensation

(2) Check effective judgment controls of parameters

Effective judgment function of the outdoor exhaust temperature thermo-bulb When conditions a and b are satisfied, the outdoor exhaust
temperature thermo-bulb is judged not to be connected into place, the mainboard of outer units will display failure of the outdoor exhaust
temperature thermo-bulb (not connected into place), stop the machine for repairing, and resume the machine by remote controls of ON/
OFF.
a. Judgment of exhaust detection temperature change:
After the compressor starts up and runs for 10 minutes, if the compressor frequency f ≥ 40Hz, and the rising value Texhaust (T
- T
up for 10 minutes) exhaust (before start-up)
once when the power is on the first time).
b. Comparative judgment of exhaust detection temperature and condenser detection temperature (T
, T = T
mode pipe temperature indoor pipe temperature in heating mode
40Hz, and T ≥(T
pipe temperature
once when power is on the first time).
2. Basic Functions
(1) Cooling Mode
1. Conditions and processes of cooling operation:
(1) If the compressor is shut down, and [Tsetup – (T
machine for cooling, the cooling operation will start;
(2) During operations of cooling, if 32ºF ≤ [Tsetup – (T
operation will be still running;
(3) During operations of cooling, if 35.6ºF ≤ [Tsetup – (T
will stop after reaching the temperature point.
2. Temperature setting range
(1) If T
outdoor ambient temperature
(2) If T
outdoor ambient temperature
minimum setting temperature for outer units judgment is 77ºF .
(2) Dehumidifying Mode
1. Conditions and processes of dehumidifying operations: Same as the cooling mode;
2. The temperature setting range is: 60.8~86ºF;
(3) Air-supplying Mode
1. The compressor, outdoor fans and four-way valves are switched off;
2. The temperature setting range is: 60.8~86ºF.
(4) Heating Mode
1. Conditions and processes of heating operations: (Tindoor ambient temperature is the actual detection temperature of indoor environment
thermo-bulb, Theating indoor ambient temperature compensation is the indoor ambient temperature compensation during heating
operations)
(1) If the compressor is shut down, and [(T
to enter into heating operations for heating;
(2) During operations of heating, if 32ºF ≤ [(T
operation will be still running;
(3) During operations of heating, if 35.6ºF ≤ [(T
will stop after reaching the temperature point.
2. The temperature setting range in this mode is: 60.8~86ºF .
Technical Information
) <35.6ºF , the outdoor exhaust temperature thermo-bulb can be judged not to be connected into place (judging
): After the compressor starts up and runs for 10 minutes, if the compressor frequency f ≥
), the outdoor exhaust temperature thermobulb can be judged not to be connected into place (judging
exhaust+37.4
indoor ambient temperature
≥ [T
low-temperature cooling temperature
< [T
low-temperature cooling temperature
indoor ambient temperature
indoor ambient temperature
indoor ambient temperature
– ⊿ T
cooling indoor ambient temperature compensation)
– ⊿ T
indoor ambient temperature cooling indoor ambient temperature compensation)
– ⊿ T
indoor ambient temperature cooling indoor ambient temperature compensation)
], the temperature can be set at: 60.8~86ºF (Cooling at room temperature);
], the temperature can be set at: 77~86ºF (Cooling at low temperature), that is, the
– ⊿ T
heating indoor ambient temperature compensation
– ⊿ T
heating indoor ambient temperature compensation
– ⊿ T
heating indoor ambient temperature compensation
– ⊿ T
indoor ambient temperature cooling indoor ambient temperature
– ⊿ T
indoor ambient temperature heating indoor ambient temperature
= T
pipe temperature outdoor pipe temperature in cooling
] ≤ 32.9ºF , start up the
] < 35.6ºF , the cooling
], the cooling operation
) –T ] ≤ 32.9ºF , start the machine
setup
) –T ] < 35.6ºF , the heating
setup
) –T ], the heating operation
setup
exhaust (after start-
19