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5322625-UIM-A-0417

Johnson Controls Unitary Products

FIGURE 15:

Ladder Wiring Diagram

2 STAGE HEAT PUMP WITH GAS HEAT

208/230-1-60

LADDER WIRING DIAGRAM

! CAUTION

OPEN ALL DISCONNECTS

BEFORE SERVICING THIS UNIT

FIELD INSTALLED CONTROL

FIELD INSTALLED POWER

24V LOW VOLTAGE

208/230V LINE VOLTAGE

1. ALL FIELD WIRING TO BE ACCOMPLISHED FOLLOWING CITY, LOCAL AND/OR
NATIONAL CODES IN EFFECT AT THE TIME OF INSTALLATION OF THE UNIT.

2. CAUTION : LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
OPERATION. IF ANY OF THE WIRING, AS SUPPLIED WITH THE UNIT, MUST
BE REMOVED, IT MUST BE REPLACED WITH TYPE 105 C. 600 VOLT
WIRE OR EQUIVALENT CLEARLY RENUMBERED FOR IDENTIFICATION.
VERIFY PROPER OPERATION AFTER SERVICING.

3. THE THERMOSTAT/CONTROL CONNECTED TO THIS UNIT MUST BE
DUAL FUEL CAPABLE.

4. FACTORY WIRED FOR 230 VOLT SUPPLY POWER. FOR 208 VOLT, MOVE
BLACK WIRES FROM THE 230 TO THE 208 VOLT TAP ON THE TRANSFORMER.

5. MOTORS ARE INHERENTLY PROTECTED.

6. SEE UNIT NAMEPLATE FOR MAXIMUM FUSE AND/OR CIRCUIT BREAKER SIZE
AND MINIMUM CIRCUIT AMPACITY.

7. SELECT "COOL" JUMPER THAT WILL DELIVER APPROXIMATELY 400 CFM/TON
FOR COOLING AND HEAT PUMP OPERATION.

NOTES:

FACTORY DSI CONTROL BOARD SETTINGS:
COMBUSTION BLWR POST PURGE: 15 SEC.
INDOOR BLWR HEAT ON DELAY: 30 SEC.
INDOOR BLWR COOL OFF DELAY: 60 SEC.
INDOOR BLWR HEAT OFF DELAY: FIELD SELECT

2 RED
3 RED

4 RED

5 RED

6 RED

7 RED

8 RED
9 RED
10 RED

Demand Defrost Control Operation / Fault Codes

High Pressure Switch fault (Not yet in lockout)
System in high pressure switch lockout (Last mode
of operation was normal compressor)
System in high pressure switch lockout (Last mode
of operation was defrost)
System in low pressure switch lockout (Last mode
of operation was normal compressor)
Low Voltage (<19.2 VAC) preventing further relay
outputs for >2 seconds
Low Voltage (<16 VAC) stopped current relay
outputs for >2 seconds
Liquid Line sensor failure (Open or Shorted)
Outdoor ambient sensor failure (Open or Shorted)
Control Failure

Flashes

Fault Condition

NONE
STEADY ON (ANY COLOR)
RAPID AMBER
4 AMBER
1 RED
2 RED
3 RED
4 RED
5 RED
6 RED
7 RED
8 RED
9 RED
10 RED
11 RED
12 RED

DSI Control Operation / Fault Codes

Power off or open fuse
Control Failure
Low Flame sense current
No G call from thermostat with Y call
Flame sensor with gas off
Check pressure switch wiring
Check pressure switch/draft inducer wiring
Airflow Problem
Flame rollout
Repeated pressure switch cycles
Failed to light burners
Loss of flame during call for heat
Incorrect polarity OR don't have neutral
Gas valve shorted "ON"
Check blower motor/wiring
Missing model ID plug OR ID plug
improperly connected.

Flashes

Fault Condition

Normal Operation

GREEN HEARTBEAT
AMBER HEARTBEAT
RAPID GREEN FLASHES

Normal Operation / Standby mode
Call for gas heat active
Control in Factory Test mode

Operational Fault Codes

Normal Operation

LAMP OFF
STEADY RED

SLOW RED

RAPID RED

No Power to Control
Compressor operation active -
Compressor contactor energized.
Control normal operation -
No call for compressor.
Control normal operation -
ASCD (Anti Short Cycle Delay) active

Operational Fault Codes

PRESSURE

SWITCH

BLK

RED

BRN

BRN/WHT

RED

BLK

PUR

BLK

PUR