CHARGING THE UNIT
The DJ150
TROUBLESHOOTING
Troubleshooting of components may require open- ing the electrical control box with the power con- nected to the unit. Use extreme care when working with live circuits! Check the unit name- plate for the correct line voltage and set the voltme- ter to the correct range before making any connections with line terminals.
When not necessary, shut off all electric power to the unit prior to any of the following maintenance proce- dures so as to prevent personal injury.
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dan- gerous operation which could cause injury to person and/or damage unit components. Verify proper oper- ation after servicing.
PREDATOR MAGNUM FLASH CODES
Various flash codes are utilized by the unit control board (UCB) to aid troubleshooting. Flash codes are distinguished by the short on and off cycle used (approximately 200ms on and 200ms off). To show normal operation, the control board flashes a 1 second on, 1 second off “heartbeat” during normal operation. This is to verify that the UCB is functioning cor- rectly. Do not confuse this with an error flash code. To prevent confusion, a
Current alarms are flashed on the UCB LED. The alarm his- tory can be checked by pressing and releasing the ALARMS button on the UCB. The UCB will cycle through the last five
(5)alarms, most recent to oldest, separating each alarm flash code by approximately 2 seconds.
In some cases, it may be necessary to “zero” the ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and release the UCB TEST button once.
TABLE 28: UNIT CONTROL BOARD FLASH CODES
Flash Code | Description | |
|
| |
On Steady | Control Failure - Replace Control | |
|
| |
Heart Beat | Normal Operation | |
|
| |
1 Flash | Not Applicable | |
|
| |
2 Flashes | Control waiting ASCD* | |
3 Flashes | HPS1 - Compressor Lock out | |
|
| |
4 Flashes | HPS2 - Compressor Lock out | |
|
| |
5 Flashes | LPS1 - Compressor Lock out | |
|
| |
6 Flashes | LPS2 - Compressor Lock out | |
|
| |
7 Flashes | FS1 - Compressor Lock out | |
|
| |
8 Flashes | FS2 - Compressor Lock out | |
|
| |
| Ignition Control Locked Out/ | |
9 Flashes | Ignition Control Failure / Limit Switch Trip / No | |
| Jumper Plug in Heat Section | |
|
| |
10 Flashes | Compressors Locked Out On Low | |
Outdoor Air Temperature* | ||
| ||
11 Flashes | Compressors Locked Out Because The | |
Economizer Is Using Free Cooling* | ||
| ||
12 Flashes | Fan Overload Switch Trip - Not Applicable On This | |
Unit | ||
| ||
|
| |
13 Flashes | Compressor Held Off Due To Low Voltage* | |
|
| |
14 Flashes | EEPROM Storage Failure (Control Failure) | |
|
| |
OFF | No Power or Control Failure | |
|
|
*. These flash codes do not represent alarms.
TABLE 29: IGNITION CONTROL FLASH CODES
FLASHES | FAULT CONDITIONS | CHECK | |
|
|
| |
STEADY ON | Control Failure | Control | |
|
|
| |
HEARTBEAT | Normal Operation |
| |
|
|
| |
1 | Not Applicable |
| |
|
|
| |
2 | Pressure Switch | Pressure Switch | |
Stuck Closed | |||
|
| ||
|
|
| |
3 | Pressure Switch Failed | Venter Pressure Switch | |
To Close | Vent Blocked | ||
| |||
|
|
| |
4 | Limit Switch Open | Main Limit | |
AUX Limit | |||
|
| ||
|
|
| |
| Flame Present With Gas |
| |
| Off First Stage Gas Valve |
| |
| Energized With W1 Off |
| |
5 | Second Stage Gas Valve | Gas Valve | |
| Energized With First |
| |
| Stage |
| |
| Gas Valve Off |
| |
|
|
| |
|
| Gas Flow | |
6 | Ignition Lockout | Gas Pressure | |
Gas Valve | |||
|
| ||
|
| Flame Sensor | |
|
|
| |
STEADY OFF | No Power Or Control | 24VAC or Control | |
| Failure |
| |
|
|
|
Unitary Products Group | 43 |
