Honeywell TrolaTemp MABS EZ-2 User Manual

69-1360–2 G.H. Rev. 9-01 www.honeywell.com/yourhome
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MASTERTROL® AUTOMATIC BALANCING SYSTEM™ (MABS®) EZ ZONE (EZ-2 AND EZ-4) CONTROL PANELS
TROUBLESHOOTING
The primary diagnostic tools are the system and damper status LEDs. See Table 9 for troubleshooting guide.
Table 9. Troubleshooting Guide.
Symptom Problem Solution
No LEDs light No power to the panel. • Check for 24 Vac across TR2.
• Check circuit breaker; if hot, a short exists in
thermostat or damper wiring.
Erratic operation Insufficient voltage.
Incorrect configuration
Panel in Emergency Heat mode
Panel needs resetting.
Check for 24 Vac ±10% across TR1 and TR2.
Verify jumpers and DIP switch setting for correct
configuration.
Check position of Em Heat switch.
Press Boot button and recheck system operation.
Heat or Cool LEd flashes
continuously
Heat LED flashing.
Cool LED flashing.
ZoneMAX Sensor tripped on high limit.
ZoneMAX Sensor tripped on high limit.
Heat pump works in
Heat but not in Cool or in
Cool but not in Heat
Incorrect thermostat.
Incorrectly wired.
Install the correct thermostat.
If equipment is heat pump, be sure there is a Y1 or
W1 jumper installed.
Emergency heat not
coming on
Incorrectly wired.
Incorrect thermostat.
Verify thermostat and equipment wiring.
Verify correct thermostat is used.

Honeywell TrolaTemp MABS EZ-2 Specifications

General

Brand	Honeywell
Model	TrolaTemp MABS EZ-2
Category	Control Panel
Language	English