Panasonic ECOi service manual

ECOi Technical

Tips

Refrigerant Properties

Higher Pressure (R410A is 1.6 times higher than R22.)
Compressor oil is different.

R410A uses Polyol Esther Oil (Synthetic fluid)

Different Gauge-manifold, Charge hose, etc., must be used for
R410A.

Near-Azeotrope Type Refrigerant
Only charge the refrigerant in liquid form.

U Series

Increasing fan Speed

If External static pressure is too great (due to long extension of ducts, for example), the air flow volume may drop
too low at each air outlet. This problem may be solved by increasing the fan speed using the following procedure:

1. Remove 4 screws on the electrical component box and remove the cover plate.

2. Disconnect the fan motor sockets in the box.

3. Securely connect the booster cable sockets between the disconnected fan motor sockets as shown below.

4. Place the cable neatly in the box and re-install the cover plate.

Indoor Unit Power Requirements

All Eco-I indoor units require a 208/230 VAC single
phase power supply. Each indoor unit should be
supplied with a field supplied disconnect switch.

Ex: Typical Wiring Connections at Indoor Unit

Disconnect Switch

Field Supplied

208/23 0 VAC Power Supply

Ground

Interconnecting Shielded

Control Wires

Remote Control

Shielded Wire

115 VAC

115 VAC

12 VDC

Shield must be grounded on one end

12-15VDC

L1
L2

G
U1

U2
R1
R2

Indoor unit terminal strip

A good communication line should read around 100
ohm’s at both the indoor and outdoor unit.

Indoor unit at U1 & U2 communication line Outdoor unit at U1 & U2 communication line

Power Requirements for Mini-Eco-I 3 & 5 Ton