Arzel AirBoss - Troubleshoot Manual

1
Arzel® Zoning Technology
(AirBoss™ and 1200 Series Panels)
Troubleshooting Guide
1) VOLTAGE TEST
a) 24 Volt AC
i) Check AC voltage at 24-VAC R & C terminals, no less than 21.6 Volts A/C
should be present from Arzel supplied Transformer
(40 VA for 2, 3, and 4 zone panels)
(100 VA for 6 and 8 zone panels)
b) 24 Volt DC
i) Generate a call for “Y1”, “Y2” & “G” at zone 1 only (use jumpers if needed),
and set all other zones to “Auto Fan” and “Off”. (This will energize all but
one solenoid and put the board under its heaviest load)
ii) With board under full load, there should be no less than 24 Volts DC between
(SOLENOID “ + “) and (BYPASS “ D “) terminals
iii) If 24 Volts AC is present at 24VAC terminals and the DC Volts is less than
24, the board will need replaced
2) TESTING BOARD “OUTPUT” (EQUIPMENT FUNCTION) RELAYS.
a) Turn “Power” switch “ON” (Red LED On) and call for Heat from one or more
thermostats;
i) Is the Red “W1” LED lit at the “HVAC OUTPUT” terminal?
(1) Yes!
LED is on
(a) Check for continuity (0 Ohms) between the “R” and “W1” terminals at
the “HVAC OUTPUT” terminal strip on Arzel board (wires removed).
(b) If no continuity (∞ ohms), the board must be replaced.
(c) If continuity is present (0 ohms), the board is OK and the problem is
with the HVAC equipment or a faulty wire between panel and
equipment.
(i) Turn panel Power switch “OFF” and Check voltage (A/C) between
HVAC Output “R” & “W” terminals (wires connected).
(ii) No Voltage indicates problem with equipment control power or
wiring.
(2) No! LED is not lit - Check for 24v ac between “W1” and “C” terminals at
the calling zone terminals.
(“W1” with an “O” is an illegal call and will be ignored)
(“W2” without a “W1” is an illegal call and will be ignored)

Summary

Voltage Test

24 Volt AC Test

Verifies AC voltage at 24-VAC R & C terminals from the transformer.

24 Volt DC Test

Checks DC voltage under load between solenoid (+) and bypass (D) terminals.

Testing Board Output (Equipment Function) Relays

W1 LED Status and Follow-up Checks

Verifies W1 LED status, checks continuity or voltage based on status.

Damper Operation

Verify Damper Pressure;Vacuum

Measures pressure or vacuum to a damper using a gauge or airflow indicator.

Close Damper Procedure

Ensures positive pressure of at least 25" wc is applied to close the damper.

Open Damper Procedure

Ensures vacuum of at least -25" wc is applied to open the damper.

Solenoid Testing

24 V DC Solenoid Test

Checks for 24V DC at solenoid terminals and verifies pressure/vacuum indicators.

Solenoid Ohm Test

Measures solenoid resistance between the loose lead and the '+' terminal.

Solenoid Bleed Through Test

Tests for bleed-through by plugging ports and observing operation changes.

Air Side Integrity Check

Leak Detection with Air Flow Indicator

Uses an indicator to find air leaks in tubing or damper actuators.

Damper Actuator Leakage Test

Checks actuator for leaks by disconnecting, moving blade, and blocking port.

LAT Operation

Heating LAT Set Point

Adjusts heating LAT set point to maintain supply air temps within furnace specs.

Cooling LAT Set Point

Sets cooling LAT set-point to prevent coil freezing or compressor cycling.

Master Zone Control Function

Operation with Master Control On

Explains that only zone #1 calls for system function when master control is on.

Bypass Operation and Remedies

Air Surging Noise

Addresses air surging noise by checking bypass size or installing orifices.

Fan Operation Issues

Troubleshoots ICM variable speed motor ramping by checking bypass or blower speed.

Solenoid;Pump Operation

Verify Damper Pressure;Vacuum

Measures pressure or vacuum to a damper using a gauge or airflow indicator.

Close Damper Procedure

Ensures positive pressure of at least 25" wc is applied to close the damper.

Open Damper Procedure

Ensures vacuum of at least -25" wc is applied to open the damper.

Air Side Integrity Check

Leak Detection with Air Flow Indicator

Uses an indicator to find air leaks in tubing or damper actuators.

Damper Actuator Leakage Test

Checks actuator for leaks by disconnecting, moving blade, and blocking port.

LAT Operation

Heating LAT Set Point

Adjusts heating LAT set point to maintain supply air temps within furnace specs.

Cooling LAT Set Point

Sets cooling LAT set-point to prevent coil freezing or compressor cycling.

Bypass Operation and Remedies

Bypass Operation with Zone Calls

Checks bypass operation with smallest and largest zone calling for cooling.

Air Surging Noise Remedies

Addresses air surging noise by checking bypass size or installing orifices.

Fan Operation Issues Troubleshooting

Troubleshoots ICM variable speed motor ramping by checking bypass or blower speed.

Arzel AirBoss Specifications

General

Brand	Arzel
Model	AirBoss
Category	Control Panel
Language	English