Service Manual

UNIT IDENTIFICATION

Troubleshooting Charts for Air Conditioners and Heat

Pumps are provided in the appendix at back of this manual.

They enable the service technician to use a systematic

approach to locate the cause of a problem and correct

system malfunctions. This section explains how to obtain

the model and serial number from the unit rating plate.

These numbers are needed to service and repair the

R- 410A and R- 22 air conditioner or heat pump. Model and

serial numbers can be found on unit rating plate.

Table 1—Air Conditioner and Heat Pump Model Number Nomenclature

OUTDOOR UNIT MODEL NUMBER IDENTIFICATION GUIDE

Digit Position: 1 2 3 4 5, 6 7 8 9 10 11 12

Example Part Number:

N 4 A 3 18 C K A 1 0 0

* = Mainline

N=Entry BRANDING

4 = R- 410A

X = R- 410A

REFRIGERANT

A = Air Conditioner

H = Heat Pump TYPE

3 = 13 SEER

4 = 14 SEER

5 = 15 SEER

6 = 16 SEER

7 = 17 SEER

9 = 19 SEER

NOMINAL EFFICIENCY

18 = 18,000 BTUH = 1- 1/2 tons

24 = 24,000 BTUH = 2 tons

30 = 30,000 BTUH = 2- 1/2 tons

36 = 36,000 BTUH = 3 tons

42 = 42,000 BTUH = 3- 1/2 tons

48 = 48,000 BTUH = 4 tons

60 = 60,000 BTUH = 5 tons NOMINAL CAPACITY

A = Standard Grille

C = Coastal

G = Coil Guard Grille FEATURES

H = 208/230- 3- 60

K = 208/230- 1- 60

L=460-3-60

VOLTAGE

Sales Code

Engineering Revision

Extra Digit

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