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105
Useful Functions (SM800AT-E only)
Self-Diagnosis by LED Indication
In addition to the code checking by remote controller of the indoor unit, troubles of the outdoor unit can be diagnosed by LED
indications on the cycle control P.C. board of the outdoor unit. Utilize them for various checks.
For the check by remote controller of the indoor unit, refer to the Installation Manual of the indoor unit.
Before a check, confirm each bit of the DIP switch is set to OFF position.
LED indication and code checking
Installation/Servicing Tools
Changes in the product and components
In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, service
port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)
• In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size of opposite
side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)
New tools for R410A
ON
123
4
LED
indication
D800
: Red
¡
D801
: Yellow
¡
D802
: Yellow
¡
D803
: Yellow
¡
¥
: Rapid flash
l
: Go off
¡
: Go on
• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U,S.’s ARI
specified rose color (ARI color code: PMS 507).
• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to the charge
hose’s port size.
10
FINAL INSTALLATION CHECKS
DIP switch
SW800
Cycle control P.C. board
LED indication
D800 D801 D802 D803
¡
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ll
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l
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l
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l
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l
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ll
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l
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ll
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l
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l
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ll
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¥ l
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Cause
Heat exchanger sensor (TE) error
Suction sensor (TS) error
Discharge sensor (TD) error
High-pressure protection error
Outdoor temperature sensor (TO) error
DC outside fan error
Communication error between IPDU
Discharge temp. error
EEPROM error
Communication error between IPDU
G-Tr short-circuit protection
Detect circuit error
Current sensor error
Comp. lock error
Comp. break down
Phase missing detection, Detection of coming-off of CT current sensor
Serial communication error by thermo. operation of Comp. case
New tools for R410A
Gauge manifold
Charge hose
Electronic balance
for refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8)
Flare tool
(clutch type)
Gauge for projection adjustment
Vacuum pump adapter
Gas leakage detector
Applicable to R22 model
××
××
×
××
××
×
¡
××
××
×
¡
——
¡
××
××
×
Changes
As pressure is high, it is impossible to measure by means of conventional
gauge. In order to prevent any other refrigerant from being charged, each
port diameter is changed.
In order to increase pressure resisting strength, hose materials and port
size are changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to check the port size.
As pressure is high and gasification speed is fast, it is difficult to read the
indicated value by means of charging cylinder, as air bubbles occur.
The size of opposite sides of flare nuts have been increased. Incidentally,
a common wrench is used for nominal diameters 1/4 and 3/8.
By increasing the clamp bar’s receiving hole, strength of spring in the tool
has been improved.
Used when flare is made with using conventional flare tool.
Connected to the conventional vacuum pump. It is necessary to use an
adapter to prevent vacuum pump oil from flowing back to the charge hose.
The charge hose connecting part has two ports-one for conventional
refrigerant (7/16 UNF 20 threads per inch) and one for R410A.
If the vacuum pump oil (mineral) mixes with R410A a sludge may occur
and damage the equipment.
Exclusive for HFC refrigerant.