Daikin APGM3 Service And Troubleshooting page 10

SYSTEM OPERATION
L2
INDUCER
LOW
T1
K4
Q3
FS
T2
C9
U6
5
4
U7
3
U4
2
1
U3
U5
180
SPEED UP
F1
150 NONE
120 5 MIN
SW1 90 10MIN
R C W1W2 G
BLOWER STAGE
FAULT ECON
DELAY
RECALL OFF DELAY
Pin Voltage
1 24VAC Indoor/Outdoor Thermostat (IDT/ODT) Output
2 24VAC High Stage Compressor Output
3 24VAC Pressure Switch/Loss of Charge Switch Input
4 24VAC Indoor/Outdoor Thermostat (IDT/ODT) Input
5 24VAC Pressure Switch/Loss of Charge Switch Output
6 24VAC Low Stage Compressor Output
Table 1: Circuit Definitions and Voltage Ratings
for the 6-Circuit Connector Circuits
Pin Voltage
1 24VAC
2 24VAC
3 24VAC
4 24VAC
5 24VAC
6 24VAC
7 24VAC
8 24VAC
9 Unused
Table 2: Circuit Definitions and Voltage Ratings
for the 9-Circuit Connector Circuits
L1
OD F
PARK
HIGH LOW HIGH
K6
K3 K5
K7
P2
U2
U1
K2
K1
Y1 Y2
Function
Function
Limit Switch Output
24VAC Input to Control
Limit Switch Input
Unused
24VAC Common
Pressure Switch Output
Main Valve High Output
Pressure Switch Input
Main Valve Low Output
Terminal
Line Voltage L1
Transformer Line L1
Air Circulating Blower Line 1
Induced Draft Blower Low Speed
Induced Draft Blower High Speed
Condenser Fan Motor Low Speed
Condenser Fan Motor High Speed
Line Voltage L2
Transformer Line L2
Air Circulating Blower Line 2
Induced Draft Blower Line 2
Condenser Fan Motor Line 2
Direct Spark Igniter
Flame Detection
Table 3: High Voltage Terminals
Period
Pre-Purge 15 Seconds
Inter-Purge 30 Seconds
Post Purge 30 Seconds
Trial-for-Ignition (TFI) 7 Seconds
Flame Stabilization Period 10 Seconds
2 Seconds within Flame Stabilization Period
Flame Failure Response Time
2 Seconds or Per ANSI Z21.20 Outside of Flame Stabilization Period
Low to High Stage Delay Selectable 5 minutes or 10 minutes (Default = 10 minutes)
Heat ON Delay 30 Seconds
Selectable 90, 120, 150, or 180 Seconds
Heat OFF Delay
(Default = 150 Seconds)
High Stage Heat OFF Delay 30 Seconds
Cool ON Delay 6 Seconds
Cool OFF Delay 45 Seconds
Continuous Fan ON Delay 0 Seconds
Continuous Fan OFF Delay 0 Seconds
Ignition Attempts 3
Recycles Infinite
Automatic Restart 60 Minutes
Pressure Switch Lockout Delay 5 Minutes
Factory Test Mode Active Time 2 Minutes Maximum
Table 4: Control Timings
Color Function
Normal
Intrnal/Gas Valve Fault
Lockout
Pressure Switch Stuck Open
Pressure Switch Stuck Closed
Red
Open High Temperature Limit
Flame Detected with Gas Valve De-Energized
Compressor Short Cycle Delay Active
Limit Opened 5 Times in Same Call For Heat
Indoor Thermostat/Outdoor Thermostat is Open
Pressure Switch/Loss of Charge Switch is Open
Normal Flame
No Flame Present
Amber
Low Flame Current
Flame Detected with Gas Valve De-energized
Table 5: LED Status Codes and Corresponding
System Condition
Label
L1
L1
L1
DI Low or "Inducer Low"
DI High or "Inducer High"
ODF Low
ODF High
L2
L2
L2
L2
L2
T1
FS
Timing
LED Flashes/Status
On
Off
1
2
3
4
5
6
7
8
9
On
Off
1
2
10